The Truth About "Rising" Male Infertility - Cheddar Explains

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Among all the other events of the last few years, you may have missed this one: Spermageddon. This is the fun name for the idea that sperm counts among mainly ‘Western’ men are in freefall. The Spermageddon hype began with the publication of a 2017 study showing a nearly 60% drop in overall sperm counts in men living in North America, Europe, Australia, and New Zealand.
But four years later, it seems that Spermageddon has been overblown. By a lot. And all that hype has obscured the real issue behind declining male fertility.
Further reading:
Human Reproduction Update [original “Spermageddon” study]
academic.oup.com/humupd/artic...
Human Fertility [2021 rebuttal study]
www.tandfonline.com/doi/abs/1...
Smithsonian Magazine
www.smithsonianmag.com/scienc...
The New York Times
www.nytimes.com/2021/06/04/he...
Asian Journal of Andrology
www.ncbi.nlm.nih.gov/pmc/arti...
The World Health Organization
www.who.int/docs/default-sour...
National Library of Medicine
medlineplus.gov/ency/article/...
Epidemiology [research journal]
pubmed.ncbi.nlm.nih.gov/21629...
BBC News
www.bbc.com/news/health-12634109
British Medical Journal
pubmed.ncbi.nlm.nih.gov/1393072/
The Conversation
theconversation.com/male-fert...
Translational Andrology and Urology
tau.amegroups.com/article/vie...
American Society for Reproductive Medicine
asrm.confex.com/asrm/2021/mee...
Urology [research journal]
www.goldjournal.net/article/S...
EXAMPLES OF 2017 SPERM COUNT CRISIS IN THE MEDIA:
The New York Times
www.nytimes.com/2017/08/16/he...
BBC News
www.bbc.com/news/health-40719743
Scientific American
www.scientificamerican.com/ar...
The Guardian
www.theguardian.com/lifeandst...
NPR
www.npr.org/2017/07/31/539517...
USA Today
www.usatoday.com/story/news/2...
The Washington Post
www.washingtonpost.com/news/t...
Insider
www.businessinsider.com/sperm...
Newsweek
www.newsweek.com/2017/09/22/m...
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10 июн 2024

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Комментарии : 1,2 тыс.

@karinshedd7334 2 года назад

Hello! I produced this video. Let me know if you have any questions about the video here and thanks for watching!

@karinshedd7334 2 года назад

I'll start: Hey Karin, what's the most interesting tidbit you learned for this video that didn't make the final cut? A: Great question! Dr. Smith told me that part of his work entails taking testicular biopsies from patients whose future fertility is in question in order to create sperm from them at a later date. These patients include people like young children with cancer or pre-everything transgender patients. However, because we still know so little about how sperm are made ('spermatogenesis'), he can't do that yet! So here's hoping we figure it out.

@standard12th66 2 года назад

It's great to pick a topic that isn't talked about enough. I noticed there was no mention of the drop in testosterone levels among generations and how it effects male fertility. Any reason it wasn't mentioned?

@karinshedd7334 2 года назад

@@standard12th66 A good question! Mostly for time constraint reasons, honestly. I chose to focus narrowly on sperm count specifically for this piece, which unfortunately means leaving out info like that. Glad you brought it up here!

@Dexy83 2 года назад

Hi Karin! Did the Doc mention lower sperm count due to COVID19?

@joeygenna4801 2 года назад

Hey Karin, how does someone like Dr. Smith go about getting into his field?

@Zerepzerreitug 2 года назад

As others have mentioned, dust the raspberries with flour before incorporating them into the cake mixture so they don't sink to the bottom. Works also with nuts, raisins, and other cake-goodies.

@AdrianColley 2 года назад

Flour? You're kidding. Can we dust boats in something similar so they won't sink?

@franklintangelo3456 2 года назад

@@AdrianColley not exactly dust, but you can spray the hull with a hardening/expanding foam to increase the buoyancy a bit.

@nateonmission 2 года назад

I saw the headline Then I saw this comment I was so confused ROFL

@franklintangelo3456 2 года назад

@@nateonmission wow

@villevalste1888 2 года назад

@@nateonmission It does make sense tho.

@cw4019 2 года назад

3/4 of this country is overweight or obese, has anyone controlled for that in a study because it has to be a significant contributor to low sperm counts

@LEFT4BASS 2 года назад

The phenomenon is happening across the entire west though, not just the US. It would be good to study that effect, but the fact it’s happening in a Europe, Australia, and NZ as well would seem to imply it’s not obesity.

@AelwynMr 2 года назад

We know obese men have lower sperm count, so that's part of it. There is much more to lifestyle than that: inactivity, too much sitting and too little exercise, unhealthy eating, too much time spent inside, lack of sleep, mental health, and more. Then there are chemicals, which may also play some probably minor role, if indeed this is a trend that exists. As the host said, there are huge differences between the results of one lab and another, as well as between cities in the same country and so on. I say chemicals probably play a minor role because if it were this easy, you would expect a huge effect in people who are highly exposed (to BPA, say), but we've looked and... it's not that simple. Then are the studies controlled for age? Health? What about the frequency of ejaculation? If one jerks off twice daily, you know... and how is the change distributed? All go down? Some drop a lot and most not at all? These sort of reviews must be taken with much scepticism, and as always "more research is needed".

@constantinethecataphract5949 2 года назад

Micro plastics

@minutemansam1214 2 года назад

@@LEFT4BASS You do realize Europe, Australia, and New Zealand are also fairly overweight, right? Obesity is a problem in every industrialized country.

@willempasterkamp862 2 года назад

@@constantinethecataphract5949 and porn consuming, junkfood, alcohol, MDMA, smoking, cannabis, cafeine

@RichJordan3 2 года назад

This may be the video with the greatest visual aids on RU-vid. You had me with the sock models, but the green onions wins the internet. Well done.

@karinshedd7334 2 года назад

Thanks! My coworker/editor crushes it. I found the pattern for the knit sperm on Ravelry if anyone wants to make their own :P

@haddow777 2 года назад

It is a super complicated issue. Pesticides and such have been shown to act like synthetic estrogens and studies have show rural farm areas have lower fertility rates amongst men than urban. Still, it would be nice to see how those results hold up considering the flaws you pointed out. Still, I do remember an article that made a big deal about Canada banning rubber ducky importing. It just seemed so weird. After reading it though, it was a bit shocking. It seemed, that Europe banned the a decade before hand and Canada finally did it as they were one of the few remaining countries left so they were worried they would become a dumping ground for them. What was all the hysteria about rubber duckies? Well, it seems that the material they were made out of leached synthetic estrogen and could affect male growth. Especially if licked or chewed on. It's like they were specifically made to dose babies with estrogens. So, yes, the subject is complicated.

@zeke1220 2 года назад

@Ben Dover Yep, and they're in the blood of almost every person in Western societies!

@FakeSchrodingersCat 2 года назад

It is probably even easier then pesticides acting like estrogen. Pesticides are poison whose dose is theoretically to small to actively kill larger animals but it is still poison with all the normal side effects like killing things so is it any wonder that something small like sperm might die if exposed to the chemicals in pesticides even after it has been metabolized. Way too much pseudo science and misinformation have grown up around estrogen and testosterones in relation to fertility that it is blamed way more often then it is actually the problem. Sorry the alpha male idiots dosing themselves with testosterone needlessly is a sore point for me especially since elevated testosterone is more likely to lead to infertility then elevated estrogen in an otherwise healthy male.

@haddow777 2 года назад

@@FakeSchrodingersCat I don't think the estrogen is meant to be a major issue in adulthood. I think the science behind why it can have a negative effect of male fertility is from how it effects children growing into adulthood.

@therealspeedwagon1451 2 года назад

Is it a way to go on your own hormone therapy if your transgender?

@lessgo16 2 года назад

Also material made out of GoreTex, specifically Teflon, has plastic chemicals that will stay in your body forever and cause endocrine disruption. It includes some waterproof sportswear (it is being phased out however), floss, and some non-stick pans. Try your absolute best to store all of your food away from plastic materials, most of the plastics haven't even been studied that well, and the ones that we have studied are horrifying, specifically PVC plastic.

@joermnyc 2 года назад

Funny, I got an ad for a women’s fertility clinic before this… 🤷‍♂️

@annache250 2 года назад

Same…

@unionmaster 2 года назад

Same haha, must be a planned thing. I've never seen that add before

@ahniiso5642 2 года назад

Also got it

@Deninoiforu 2 года назад

Well ads do represent what sort of content you've been watching 👀 just saying lmao

@tanjoy0205 2 года назад

Hmm how suspicious

@monkeywrench1951 2 года назад

The social part of it is that possibly in the past women got blamed for infertility even when it was due to men’s infertility issues.

@matheussanthiago9685 2 года назад

Oh, I've seen this one

@zumabbar 2 года назад

looking at you, Henry VIII

@TheTrainedLamb 2 года назад

tf do women have to do with this? We are talking about male infertility and how much it has increased over several decades. Always gotta include women's issues in everything right? Can't let men's issues be in the spotlight of a discussion for once. Women's issues get talked about enough as it is.

@GandhiTheGodOfWar 2 года назад

@@TheTrainedLamb You can calm down dude.

@TheTrainedLamb 2 года назад

@@GandhiTheGodOfWar the autocorrect made "tf" caps idk why. I'm not mad or anything I was calm when I made that comment. Can't express my opinion without some temper police telling me to calm down because they don't have anything worthwhile to respond to my comment with. That shit is pretty annoying

@seasong7655 2 года назад

It's caused not only by exposure to EDCs, but also by smoking or being overweight. Which are all things you can avoid. Exposure to EDCs is also avoidable by not cooking in non-stick pans, and limiting plastic products.

@RevoOnRev1337 2 года назад

nice playlist collection xd

@seasong7655 2 года назад

@@RevoOnRev1337 thanks yours too xD

@Shuubox 2 года назад

What doesn't come in plastic nowadays though..

@garycard1456 2 года назад

Varicoceles are also a cause. Perhaps a lot of men are walking around with undiagnosed and untreated varicoceles. The size of the varicocele does not correlate with (in)fertility: some men with large varicoceles do not have male subfertility; whereas other men with small-grade or subclinical varicoceles have marked male subfertility. Lifestyle factors play a role: a smoker or heavy drinker with a varicocele will have poorer spermatozoa quality than a clean living man with varicocele. Dietary antioxidants from (preferably pesticide-free: organic certified) vegetables and fruits help to protect spermcells from freeradical damage and oxidative stress caused by varicoceles. Thankfully, varicoceles are readily treated by outpatient surgery (microsurgical varicocelectomy or embolisation).

@whwhywhywhywhywhywhy 2 года назад

I've seen several videos in here that argued the fear over nonstick is unfounded in pretty much every way

@davidmicheletti6292 2 года назад

I’m one male who has become effected with low sperm counts. My mother took DES when she was pregnant with me. As a result my right testis failed to develop at all causing the the testis to remain in it early gonad tissue form. In addition the other testis did develop as such but only matured to about half of normal size for an adult male. As an adult I did marry and we even managed to product two children over a protracted time frame so it is posable to have children in such cases. The othe side is this has caused me much pain in the form of corrective surgeries and later in life stage three cancer. This cancer took the form of testicular/ ovarian cancer. My surgeries and treatments have taken a whole life time and even a few years ago I was still getting repairs done to correct damage done in early surgeries. If that were not enough the phycological horror of even having your own mother tell you she wished she had not given birth to you because of all the suffering I’ve had to deal with. The good news is we did manage to have two wonderful children. Both appear totally normal with no side effects related to this. Our daughter has had three children all of who are normal as far as we can see. Twenty four years ago I was given only two months to live because of the advanced cancer but I survived the massive surgeries and chemo. All is not hopeless yet at the same time this is very much could be the face of human sexual developments. The truth is I am intersex making me not male nor female, it is not a state I would ever ask for myself but it is who I am. I’ve managed to hold the love of my wife of forty years and the love of people around me. It is what it is.

@janereich5170 2 года назад

My husband had low count and motility 6 million per ML 20% motility then he started working out a bunch and became 35 million per ML with 80% motility lifestyle has a lot to do with it!!!

@anthonygreenfield123 Год назад

He was obese?

@janereich5170 Год назад

@@anthonygreenfield123 no he just started working out and building muscle

@Hercules003 Год назад

Interesting. Do you mind sharing his age group like 25-34/35-44 or younger or older etc? Thanks for the comment anyways. 🙏🤝

@janereich5170 Год назад

@@Hercules003 he was 40 he’s now 42 almost 43 we are working on increasing his counts again cause he went back to low when he went back to bad lifestyle habits.

@Hercules003 Год назад

@@janereich5170 So gym and good eating habbits can help increasing counts. Very interesting. All the best to your husband and hope he gets back to his healthy habits. Thanks again for replying. 🙏🤝

@LEFT4BASS 2 года назад

I love how so many of these comments are trying to blame US-centric problems for the decline. It’s a phenomenon sweeping the entire west, not just the US.

@jimsquire-chestnuts8381 2 года назад

What US centric problems? They didn’t talk about 2nd amendment fertility treatment

@paxhumana2015 2 года назад

How about you lot worldwide hate YAHWEH EL ELOHIM and His Holy Word and He is getting tired of humanity becoming evil and unrepentant of said evil, thus He has allowed you to die in your sins, which also means low fertility rates for humankind?

@TAP7a 2 года назад

@@paxhumana2015 who are you to assume that the Almighty suffers from such human problems of "getting tired" of our behaviour? Sounds pretty blasphemous to me. How dare you anthropomorphise the Lord in such a shameless and disgusting way, you heretic. But also, it's pretty safe to say that divine intervention is... never the cause.

@sownheard 2 года назад

What is the "West" 😄 Seems like a incredible vague way to say you don't know what country's are and aren't effected

@cpuffins 2 года назад

@@paxhumana2015 yeah that's it 👍👍

@lillliil9430 2 года назад

I read about a pollutant reducing sperm count in mice via epigenetic factors, which was inherited and worsened in each new generation. There's a lot of pollutants out there

@timbrwolf1121 2 года назад

I've also hear about rat utopia and I feel like that experiment is also analogous to modern society.

@sean3533 2 года назад

Phthalates was the class of chemicals in that study. They’re a type of plastics.

@sean3533 2 года назад

@@timbrwolf1121 that’s a different rat study tho

@peekjhon750 2 года назад

Exactly

@peekjhon750 2 года назад

@@timbrwolf1121 that's another study

@giselematthews7949 2 года назад

I LIKE HER! She is a really fun presenter!

@AdrianColley 2 года назад

The personally-crocheted sperm models were just endlessly endearing. She really cares about this subject!

@chunkystains8950 2 года назад

She is! AND her voice doesn't make my speakers shaky (That's very important) ...it's annoying to have to turn down the bass.

@nicholasvsjesse 2 года назад

She’s already one of my pop-sci educators, already up there with Hank Green, but not quite at the level of Tom Scott yet. Not sure how to quantify it, but she has the right voice pitch that’s easy to stay focused on

@user-og9nl5mt1b 2 года назад

Her body is fun too

@zumabbar 2 года назад

i love her humour, it's my kind/level of humour too, so the best one

@tremondial 2 года назад

One thing that was not mentioned in this video which I am curious about is, wether these studies also take the age factor in to account. Like, 40 years ago the baby boomer gen was about 20 years old a.k.a in their prime fertility. Now they are about 60 years old a.k.a near the end of their fertility. This could have a major impact on the end result of these studies if not accounted for.

@thebigpicture2032 2 года назад

Millenials outnumber Boomers. I’m sure age would be controlled for.

@UKTeslaPicker 2 года назад

I would imagine that they are not literally testing the same people.... They probably tested a group of 20 year olds 40 years ago and then 'another' group of 20 year olds to obtain a % today You're right that testing that same original group who are now 60, would be an almost pointless exercise. That said, Mick Jagger.

@jimfrodsham7938 2 года назад

Most boomers like me are more probably in their mid '70's. I'd be interested in a study of Japan and Germany after the war.

@merrymachiavelli2041 2 года назад

I can almost guarantee that was taken into account. As far as variables go, its an extremally obvious one, and relatively easy to account for (I'm assuming they have basic data about their subjects)

@tremondial 2 года назад

@@thebigpicture2032 Not in my country. Anyway, the average age has significantly increased in pretty much all of the mentioned countries. And the amount of people nearing infertility or lessened fertility (due to age) in regard to the overall population is alot higher today then it was some 40 years ago.

@LyonTheGreat 2 года назад

Cheddar generally has great videos, but even still, this has got to be one of the best in a while. Presentation and information are all top notch! Excellent work.

@latexrope1358 2 года назад

Really well made video! Well explained an amusing. I wish all science stories in the media were this balanced and sensible.

@prion42 2 года назад

This video is over eight minutes. You're lucky to get three full minutes on the nightly news.

@latexrope1358 2 года назад

@@prion42 So?

@peekjhon750 2 года назад

In Switzerland litreraly no one is obese but we have the worse sperm count in Europe. The main reason is apparently because we (the swiss), use a lot of cleaning products that are endocrine disruptors (and that's feminizing men).

@anthonyhadsell2673 2 года назад

I’m pretty unconvinced by the inaccuracy and variability in sperm count measurements discounting the issue of lowering sperm counts, because on an individual scale yes those measurements are inaccurate but when you average it across thousands of tests it can accurately show an overall trend. Not an Armageddon but an area of concern.

@beth8775 2 года назад

Well, that was the overall conclusion. It needs more research.

@andrewmeeks6938 2 года назад

Accuracy and precision aren't synonymous. Just because the counts accurately reflect a general reduction doesn't mean that they weren't taken at the same lull for every participant. Further, considering male hormonal cycles have only been scientifically observed for the last ~50 years there could be other influences on low counts. It is entirely possible that patient unwillingness to admit failed conception attempts could tamper with the sampling of these types of studies. It is far from unreasonable to say, "sperm count is too hit and miss to make a strong correlation between lower overall counts and lower fertility rates." It could also mark a stronger tilt toward viable production instead of bulk production.

@darkzap10 2 года назад

@@andrewmeeks6938 I think it would be incredibly unlikely that every patients results were taken during a lull, but not absolutely impossible especially if there is a seasonal component to sperm count (is anyone aware of seasonality affecting sperm count?). It's hard to say without knowing the methodology of these studies. It would be nice to have a meta study comparing the existing studies.

@andrewmeeks6938 2 года назад

@@darkzap10 actually there's literature on exactly this topic, and there's ancestral, physiological/psychiatric, and birth related trends that indicate a corollary between annual phases and hormone levels. In most mammalian species, menses occurs at an annual schedule rather than monthly. Only primates, bats, elephant shrews, and one spiny mice species really have documented monthly periods. Outside of this females only exhibit fertility according to a "heat" cycle, and males seem to exhibit a similar flux in androgen expression throughout the calendar. Furthermore, most mammals show annual peak and valley trends of progenizing, while other species that have a dormancy cycle dictated by ambient temperature mirror the mammalian fluctuation by dictate of physics. In humans, birth rates peak around the summer months which tends to be the outlier, because we built houses around 20,000 years ago and sex is a great way to keep warm and entertain oneselves. Outside of this though mammalian species tend to give birth in the spring which indicates an evolutionary relation to the benefits of young rearing during the gentler spring and summer months. There are even studies suggesting that other species exhibit signs of Seasonal Affective Disorder in relation to this very real annual fluctuation of hormones. So all things being considered it is very possible that these types of studies just capture data weirdly.

@andrewmeeks6938 2 года назад

@@darkzap10 just to be clear, I shorthanded the corollary between testosterone levels and sperm gamete production.

@hippopotamusbosch 2 года назад

🍰 Dust the raspberries in a bit of flour before folding them into the batter.

@jackdeath 2 года назад

Add the berries to the dry ingredients before combining with the wet ingredients.

@mjjackal Год назад

Birth rates falling well below population replacement levels doesn't coincide with low sperm counts in your view?

@KarlBunker 2 года назад

That's the biggest laugh I ever got out of a fried egg and scallions.

@WowUrFcknHxC 2 года назад

A drop in sperm count does not necessarily mean a loss off fertility. Especially if the health and quality of the sperm are increasing as numbers decrease

@adskee69 2 года назад

True. But do we think that the drop in sperm count is coinciding with an increase in the health and quality of sperm? I would argue that it's unlikely, particularly if the drop in count is being driven by ill health from dietary, lifestyle and environmental factors. Also, the presenter mentioned in the video that a drop in sperm count won't necessarily affect your fertility, providing motility is good. Again, true. However, it's still not a great trend if the total numbers are decreasing - it doesn't bode well for the future.

@rockgod2131 2 года назад

If you watched the video, they go over this.

@abram730 2 года назад

"A drop in sperm count does not necessarily mean a loss off fertility" But there is a loss in fertility. "Especially if the health and quality of the sperm are increasing" But sperm health is falling too, along with count. This video reminds me of don't look up on Netflix.

@cyclingseagull 2 года назад

The drop in sperm count is a hoax.

@knightshade2654 2 года назад

While they may be unrelated, we have experienced a massive decrease in fertility in the first-world. Population unbalance is definitely an issue.

@allisond.46 2 года назад

It took me until the end of the video to realize that I, a single woman, have no reason to watch this. But it was still very informative and I liked the cake metaphor.

@Nezha_Main 2 года назад

You could always reincarnate as a man when you die and be like "wtf" or something and then this information would be useful!

@SelvaKumar_1992 2 года назад

Then don't blame men when don't give a shit about women problem videos.

@SonGoku-ll5gf Год назад

then why did you watch it in the first place???

@andrewmeeks6938 2 года назад

Everyone is recommending the flour trick, but you can also use powdered sugar. Another trick would be to pop your raspberries in the oven for on a low temp liking your drying them, by reducing their water content you not only increase the potency of their flavor but increase their buoyancy considerably by reducing their water weight which makes them heavier than the sugars and fats in dough. This is why many mass produced "fruit" in the dough products use a jelly mediated by flour in place of real fruit.

@michaelm8460 2 года назад

Oh this was a great video. Entertaining and educational, really hard to pull off, and you made it look effortless.

@625098evan 2 года назад

Its pretty likely that most of the infertility issues come form excess sugar intake and to little exercise. people are poorly educated, and modern life allows us to be so inactive. people require discipline and motivation.

@nationalsocialist6590 2 года назад

Why do that when I can lay down and give up on life.

@gerdaleta 2 года назад

Porn thats the problem you guys are busting your nuts to nothing

@myexperimentswithtravels9338 2 года назад

Love your topics and your presentation styles. Great way ahead. Cheers.

@pistolen87 2 года назад

Regarding BPA, wouldn't sperm count fall in Asia as well as they use a lot of plastics too? Or is it because the lack or research in non western countries? If there's a difference between wester and non west, maybe it's not because of BPA but other lifestyle factors?

@ernststravoblofeld 2 года назад

The sperm counts drop in places that do more testing. BPA may have some small part to play.

@beth8775 2 года назад

Those are all good questions and why the subject needs more research.

@spicyginger4289 2 года назад

Could be becuase China recently industrialized and doesn’t have the data from a decades ago Also honestly people care about domestic problems more than foreign

@spicyginger4289 2 года назад

Ya I feel like obesity and lack of exercise play a large role aswell given that they drop over all testosterone which impacts sperm count.

@williewilson2250 2 года назад

Asia is a lot less industrialized to the point of plastic being in western society's DNA and not others

@melequin 2 года назад

Gently tossing your berries before turning them through your batter helps to keep them from sinking!

@user-gz4ve8mw9l 2 года назад

I don't get it what's with all the berries in the comments?

@futurehofer1564 2 года назад

@@user-gz4ve8mw9l try watching the video that will help lol but she did an example with a cake using berries and in the end she asked for tips on how to bake a cake without the berries "falling" to the bottom like hers

@jeppemadsen2310 2 года назад

HS! I'm from PH, and was trying to look for the infographic in 0:45 and the entire Philippines just went missing. lol. 😂Spermaggedon is real.

@karinshedd7334 2 года назад

Oh nooo! Poor Philippines. I'll keep an eye out for it next time!

@sanashy9024 2 года назад

Sri Langka is missing too

@westrim 2 года назад

Well, they couldn't leave New Zealand out this time, since it was getting highlighted, so some other country had to be sacrificed to the map gods.

@rds7696 2 года назад

same lol, I think a chunk of indonesia is missing as well.

@suzannax 2 года назад

The fruit sinks if the cake batter isn't thick enough. Adding more flour should do the trick. It'll still taste good either way though 😋

@karinshedd7334 2 года назад

My hero! But what if I used a Betty Crocker box cake mix...can I add flour to that without messing it up?

@suzannax 2 года назад

@@karinshedd7334 Sure, just a little at a time. 👍

@snaxicakes 2 года назад

@@suzannax What do you think about putting the raspberries in the cake in the middle of baking time? Would that make it deflate or would they just sink at all?

@suzannax 2 года назад

@@snaxicakesthe top would probably have already formed some crust, so I don't think that'd be possible. Also sinking is a big possibility when opening the oven halfway through a bake.

@Lousiannie 2 года назад

@@karinshedd7334 lightly coat the berries in flour that way they cling into the batter and not fall to the bottom 😊

@b22chris 2 года назад

Cook in stainless steel or cast iron, eat healthy food, get 8+ hours of sleep, have a healthy body fat %, eat/drink less sugar, have vigorous exercise 3-4 times a week and you’ll be fine.

@fixedguitar47 2 года назад

You can do all that, a judge threatening a man with jail time unless he coughs up cash every month will cause any man to drink himself to death.

@paxhumana2015 2 года назад

Try doing that in cold environments. There are reasons why animals that live in cold environments are fat, despite having exercise.

@b22chris 2 года назад

@@paxhumana2015 well if you don’t have a heated house you have bigger problems than your sperm count.

@boygenius538_8 2 года назад

@Pax Humana ever heard of a jacket

@futurehofer1564 2 года назад

@@paxhumana2015 foxes arent fat

@jrodthegreat1 2 года назад

Low T is a lot more common these days as well. With estrogen in plastics, soy products and other problems. I actually am on TRT and my doctor said it’s actually more common than you’d think.

@teoengchin 2 года назад

Looking at the map at 0:46, it could suggest that speaking English as your first or second language causes the decrease =)

@reneea7811 2 года назад

😆

@TheSimon253 2 года назад

What about Africa, and India then?

@ArcturusCOG 2 года назад

Ur speaking English….

@BTScriviner 2 года назад

Maybe because in those countries, men are being increasingly feminized.

@introverteddawg9805 2 года назад

@@TheSimon253 Most Indians don't speak English as their first language. Nor do Africans.

@DrewRueDoo 2 года назад

The presenter is 10000% a visual learner, and I'm here for it!

@1975LadyC-Vigor 6 месяцев назад

This video was very informative and the class I took (which it was shown in) felt you were very accurate in compiling relavent and up to date information

@JennieWrenStar 2 года назад

Excellent video, well explained, thank you.🌹

@IncredibleDrone 2 года назад

This is interesting. It only skims the surface, At the start of the video you pointed at some specific countries. What do those countries have in common?

@jamesbailey754 2 года назад

I'm guessing it's that those are the countries we actually have to data to be able to do a past to present comparison, and it's less that it's only happening in those countries and more that it's only being measured in those countries.

@junjunjamore7735 2 года назад

@@jamesbailey754 I would think East Asian countries would have detailed medical records like this too?

@trawrtster6097 2 года назад

The research she is referencing looked at sperm counts in "Western countries" (i.e. US, Canada, Australia, NZ, western Europe) and "other" (i.e. any other country).

@spicyginger4289 2 года назад

They are industrialized and have been for a while. places like China are industrialized may not Abe suffered the side effects and if they have they probably don’t have the long term data that we have

@NelsonKlahr Год назад

My NeuroEndo greatly enjoyed your video, especially after watching the previous media hyped BBC report. Please continue posting your work!

@matthewo6442 Год назад

I think I've mastered the art of maximizing my sperm count. I applied to a sperm bank and they tested my sperm. They said that the average person has 60-80 million sperm, but you need 100 million to qualify as a donor, which is above average. They tested mine at 432 million, which is pretty good. Here's what I do: I eat 100% organic, no pesticides 98% of the time. I've been eating/drinking USDA organic food for 5 years at this point. I only drink Mountain Valley Water, bottled in glass. I avoid anything with chemicals, meaning that I only use the most natural soap and hygiene products, detergent, house cleaning chemicals, sunscreens, etc. I've searched far and wide for the absolute most natural products for each category possible and exclusively use those. I get calcium fluoride toothpaste imported from Europe. I also completely avoid polyester clothing. I make sure I get plenty of Sun everyday and stay active as well. There's a lot of other things I do but basically I avoid chemicals in every way possible. I'm a 25-year-old Caucasian male

@xjing800 2 года назад

I was like really scared and then she mentioned that it effects heterosexual couples conceiving and I remembered i was gay. Crisis averted dude whew

@fanbuoy9234 2 года назад

Gay couples have notoriously low fertility rates though 😁Probably pretty average when it comes to infertility, I suppose

@Xpistos510 2 года назад

It still doesn't bode well for humanity though.

@stevenscott2136 2 года назад

@@Xpistos510 Humanity will be fine in tbe long run. If the 1st-world lifestyle is the problem in some way (and it seems all the theories point that way in one form or other), then the problem will be solved when we breed ourselves into extinction and more primitive societies take our place. Alternatively, we may figure out how to convert our minds into software, and then these meat bodies and their problems will be irrelevant.

@mlc4495 2 года назад

Personal story. Me and my wife have been trying to conceive for about three years now. All the trying, nothing. I was referred to give a sample (awful experience!) and all results came (ahem) back fine. My wife also has had no indications of issues on her end either. Long story short, no one knows anything, we're on our own and the world is crap. Maybe not bringing children into it is for the best..... Nice props in the video BTW. Really liked it. Edit: After four years of trying my wife gave birth to a beautiful baby girl last night. We were about to explore IVF last year before getting the good news of a successful pregnancy. It was a long and difficult road but it worked out in the end. So happy. 🥰🥰

@BRAINSPLATTER16 2 года назад

What about IVF?

@rocketlioness 2 года назад

Just forget about it and have alot of awesome sex n enjoy eachother XD

@therealspeedwagon1451 2 года назад

Yeah just don’t bring kids into this world. There’s already enough humans and humanity is a plague to earth. Just enjoy having mind blowing sex without the worry of getting pregnant. Just stay safe from STDs and know what’s in your swamp.

@cosmic_gate476 2 года назад

@@therealspeedwagon1451Just cause you're feeling inadequate to live up to the challenges in our world, doesn't mean you should spread your putrid nihilism like a disease.

@spicyginger4289 2 года назад

Hasn’t the myth of overpopulation been disproved like hundreds of times by now…

@tym6217 2 года назад

The one other big category I would be curios to see more research on, other than just the possibility of plastics and fertilizers affecting sperm count, is the effect of excess dairy and/or soy products on it as well.

@skinisdelicious3365 2 года назад

First time i saw a video discussing issues with males. Feels good man.

@jimfrodsham7938 2 года назад

My sperm count is zero, yet I managed to give my wife four children. That was before my vasectomy though 😄

@quepacho64 2 года назад

Quality over quantity!

@jimfrodsham7938 2 года назад

@@quepacho64 that was back in the late '60's early '70's though Captain, so I probably had both.😃

@MrJamiez 2 года назад

I've had a vasectomy too. Rock on.

@paxhumana2015 2 года назад

Did you have to find out that information by being on Maury first, though?

@jimfrodsham7938 2 года назад

@@paxhumana2015 I'm not sure if you're replying to me, but no. I had my vasectomy long before the show was a glint in the producers eye. 😉

@Ollee88888 2 года назад

Interesting video and very well presented :) I actually wonder if rising stress and mental health issues might be a contributing factor if there's a slight decline in fertility in the end (Btw, if you coat your fruits with flour prior to mixing them in, they won't sink to the bottom of the dough)

@PhilJonesIII 2 года назад

Or the feminisation of men in general. Those sports and high energy activities absolutely do make a difference. What portion of men has moved from physical work to desk-bound work with little physical activity?

@abram730 2 года назад

The drop is being recorded in wild animals too. Median sperm counts are projected to hit zero around 2045.

@peekjhon750 2 года назад

There's a lot of reasons why humans are becoming infertile. The main one is the ingestion of microplastics, pollution and phtalates (present in makeup, everything made out of plastic). The secondary reasons are : bad diet, lack of exercice, stress, alcool and smoking. (According to Shanna Swan research group) We are gonna disappear because plastic is everywhere in the water cycle sadly. Even in the clouds.

@hobotf2208 Год назад

@@peekjhon750 can also be from bad enviroments trauma and etc which result in bad coping escapist mechanisms that are usually self destructive(too much smoking,too much alcohol,unsafe sex,too much drugs and dangerous ammounts of masturbating)

@promethius7820 2 года назад

Here is a mindbender, it has always been about the same percent of people that can get pregnant within a year. So what if we are evolving to have quality over quantity? Heh, sure the conventional measures seem questionable, but the result in the time frame seems to be about the same. The biggest difference is that fewer people are choosing to have children and birth control is approaching ideal.

@catatoblob8598 2 года назад

That kind of population wide change would take millenia, at least. Not 40 years.

@promethius7820 2 года назад

@@catatoblob8598 perhaps, took 30-40 generations to domesticate wolves. While that is true for natural selection, no such rules apply to artificial selection. Perhaps we are just like dogs in that aggression is tied to virulence. Since we... ehem... remove the agressive ones from the gene pool in favor of the 'rule of law', we may be left with more friendly humans who also happen to have less reproductive cells. It's anyone's guess, but natural selection assumes that organisms are removed for handicaps most commonly acquired for their mutations. That is not the case here.

@catatoblob8598 2 года назад

@@promethius7820 yea... 30-40 human generations take about a millenia. It's not about natural vs artificial, it's about force of selective pressures. Meanwhile, 40 years is closer to 1.5 human generations.

@promethius7820 2 года назад

@@catatoblob8598 it has been. Set the counter for the start of human civilization and count forward.

@catatoblob8598 2 года назад

@@promethius7820 ... this video addresses alleged decreases in sperm count over the last 40 years. Also, as far as I know, sperm count is an independent trait from other male traits.

@Kalisparo 2 года назад

To avoid your raspberries sinking to the bottom of your cake Cheddar, replace 10 of the flour with pre-gelatenized starch. It will cause the cake to be more like a gel when it's unbaked (you can make it yourself. Mix your star h of choice with water in the ratio of 1:3 and cook it on the stove until it is entirely turned into a gel. Dry it in the oven.)

@discman15 2 года назад

Nobody can afford to have children anyway

@karinshedd7334 2 года назад

It's too early in the morning in my time zone for these piping hot truths, discman15 :(

@garycard1456 2 года назад

Part-and-parcel of theCoudenhoveKalergiPlan. Make conditions (including financial) non-conducive to childbearing and raising.

@LEFT4BASS 2 года назад

Actually, there’s an inverse correlation between income and number of children. This is true on a global scale and within each measured country. People who can afford kids tend to have the least.

@Karel1 2 года назад

Just get more money

@billcipherproductions1789 2 года назад

Not everybody is you

@Izar3318 2 года назад

Pesticides/chemicals in food and water, obesity, porn addiction. That's all you need to know.

@nitt3rz 2 года назад

Very fun & informative video, I really liked the animated green onions.

@gustavouchida1 2 года назад

by 04:00 I began to wonder which kind of COMPANIES sponsor the Cheddar group...

@adrienneladd8375 2 года назад

I wouldn't be surprised if there was a decline in sperm count based on stress levels increasing, but i would be surprised if it was a major problem

@Shekupe_k Год назад

Bro, men in the world war probably had a higher sperm count than men that have to sit in a cubicle for 40 hours a week

@patriciaramsaroop5108 2 года назад

And this is why the Handmaid’s Tale spooks me out.

@defeatSpace 2 года назад

Alright, here is the insider tip for suspending berries in cake or bread, give them a toss in flour and shake off the excess before adding them to your batter or dough.

@taokodr 2 года назад

The bit with the green onions and the egg was hysterical! :D

@hellloooworld1124 2 года назад

Love the way she presented the whole thing. Good work!

@28ebdh3udnav 2 года назад

Cut back on cigarettes. Eat healthy. Exercise regularly... So basically dont do what I do. I smoke cigarettes, I eat junk a lot but I do exercise regularly.

@LumaTo 2 года назад

....and don't eat anything that has touched a buncha plastic.

@bcase5328 2 года назад

Another question, what were the ages in the data groups as of each sampling, and when and how many samples were there? Statistics can skew results in data if not careful. The age of a man can affect his sperm count.

@symphantic4552 2 года назад

To ensure raspberry motility, moisten (misting them with lemon juice is very nice!) your berries and dust them with flour or potato starch. Next pour your batter in thin (1/3 inch) layers and gently drop some powdered berries on each layer before pouring the next. Repeat this recipe frequently to ensure a large sample of data, and enlist friends and family to study the results. Finally, an oddly specific superstition in the baking world has it that naming a motile sperm "Symphantic" increases one's baking prowess.

@hewhohasnoidentity4377 2 года назад

Seeing the thumbnail and title I mistakenly expected this to be BioArk and was prepared for a laugh. ... This is good but now I want the BioArk version.

@closmasmas9080 2 года назад

I’m not too concerned about male fertility, I’m more interested in male birth control

@alicjakaczynskaofficial 2 года назад

THIS! I am still bothered by men who refuse to wear condoms...

@alicjakaczynskaofficial 2 года назад

And my ex bf refusing to wear a condom is the reason why i never slept with him..

@boygenius538_8 2 года назад

Research into fertility can lead to development in birth control.

@MattMcIrvin Год назад

This is one of those perennial news stories that pops up every couple of years and gets a burst of renewed worried attention, then fades. I remember people fretting about it in the 1990s--Matt Lauer saying on the Today Show that it might be the end of human civilization.

@gemmeldrakes2758 2 года назад

Best tip for suspending berries in cake: Don't use fresh berries. Make a fruit compote. Add that the cake mixture. Second best tip: if you want actual whole berries, coat them in flour, stir them in just before you put the mixture in the pan. Third best tip: coat berries in flour, then add to the batter in layers. Put some batter in, then drop in some berries. Cover with batter. Repeat. This might work in more liquid batter, but is more tedious.

@albusha5150 2 года назад

Love this woman's sense of humor! Wonder why a woman takes on men's problem though? The door in her room looks heavily painted and that broomstick on the corner is icing on the cake haha. Quite informative in all due seriousness. Yes, something must be done to help with infertility overall.

@karinshedd7334 2 года назад

Hahahah oh I don't know, I just came across the story and thought it was interesting. I finally moved the mop handle for my next piece, and apparently heavily-painted doors are a feature of San Francisco apartments I suppose

@qjtvaddict 2 года назад

This is a humanitarian crisis!!!!

@Lwize 2 года назад

The Great British Bake Off will look very different from now on...

@lotfibouhedjeur 2 года назад

This is the most fun RU-vidr ever. Please name one after me!

@wrightgregson9761 2 года назад

love it!!!! a fried egg and scallions!!! (about the raspberries: put them in a contaier with a bit of flour and shake them. then put them in the batter. they wont sink to the bottom as easily.

@badhollywoodscience 2 года назад

I skimmed this video and did about as much research as the producers who interviewed one person and then spent most of the video talking about sampling issues instead of current trends...so thanks for nothing?

@joshramirez7 2 года назад

Let's say what we are all thinking, even if it's true, seeing half the people walking around knowing they shouldn't be parents or how bad they already are as parents, this ain't a bad thing.

@futurehofer1564 2 года назад

@Safwaan I wish I had a functioning good Brian, my Brian broke two weeks ago and he is basically useless smh

@abrahamhwang1422 2 года назад

The cheddar staff should play dodgeball with all the props you make. Flying body parts and specimens everywhere

@timfriday9106 2 года назад

vox's unexplained podcast episode on this was very informative.

@ckmbyrnes 2 года назад

I work in a career that deals with RF radiation. There was an unverified theory that the radiation affected mens sperm so they had more girls than boys. This seems to hold true as me and many of my co-workers had girls. But, as soon as I was promoted to a desk job away from the radiation, we had a boy. The whole thing may be apocryphal, but it seems to follow that trend. More research!

@henryteague7490 2 года назад

Apocryphal> How so?

@john3_14-17 2 года назад

There are also similar stories detailing how excessive hot tub use made guys infertile, but after not using hot tubs as often, the men could get their wives pregnant. Except, these stories are actually found in a scientific paper. There are also similar stories of bakers being infertile, changing jobs or even retiring, and then being able to have kids. Reason why is because the frequent heat causes the sack to get too hot to make sperm, but once the frequent heat exposure stops for a few months, sperm can be made again. Some men have even taken advantage of this for contraception which they can then reverse when ready for children. I think this male heat contraception needs more research, as it’s much more promising than the pill ever was imo.

@davidmilhouscarter8198 2 года назад

Well, if we were to research sperm too much, then that would be sexist.

@lunayen 2 года назад

What makes you think that? If anything, it will put less blame on women should a couple have problems to conceive, since women have been blamed for millennia when the can't have kids.

@tylernero6671 2 года назад

Anyone get the ad right before that says "infertility is crying in your car"?

@electron2601 2 года назад

I love the narrater in this video. She's very articulate and engaging.

@GetOutsideYourself 2 года назад

Is this "womansplaining?"

@fencefirst2722 2 года назад

Seems orchestrated

@garycard1456 2 года назад

It is. Ashkenis are behind it. They seem to have a hardon forGennocidingtheEuropeanpeople...

@garycard1456 2 года назад

It is indeed, and it is all part-and-parcel of theCoudenhoveKalergiPlan..

@ISO8Legionaire Год назад

what about the meta analysis from south Korea on cell phone usaged decreasing infertility & motility by reviewing 18 different studies?

@jamesthornton9399 2 года назад

Love the knitted props.

@miroslavhoudek7085 2 года назад

I was at a fertility clinic few kids ago to check where's the problem in the conception. And they said that I have the best spermiogram they have seen in a looooong time. It kinda made me sad to be honest. I mean, at first it felt good. But then I realized that I really always wanted to achieve something exceptional using my skill, smarts and perserverence. Meanwhile I only achieved something that's done involuntarily in my balls when I sleep 😞

@noahbailey542 2 года назад

Yay more Karin videos!

@ecthelion222 2 года назад

Have you ever been only listening to a vid on RU-vid and an ad starts playing yet you don’t realize it for a moment or two bc the music in the ad is highly similar to the background music in the video? And then you start hearing the ad swear and have to skip it. I wonder if this is planned to make you listen to the bloody incessant ads.

@Paul.Gallant Год назад

Zinc, Sperm and Glyphosate as chelating agent. Sperm requires Zinc to be produced. Unfortunately, our intensive agriculture process leverages the use of Glyphosate. One of many side effect of Glyphosate is that it is a chelating agent to many nutrients like Zinc. Glyphosate effect is cumulative and does not just affect plants, but also animals... More globally, all living things on Earth.

@jo3ywils0n39 2 года назад

This is a cool topic and interesting content covered here - But, this presenter took about 4x longer than she should've for this. Did she really need to elaborate on sampling bias, that much? Did they really have to run that sampling bias analogy by the doctor? It's called sampling bias because of the bias of the sample, pretty straightforward...

@talideon 2 года назад

Yes, because media sensationalism is half the point of the video, and lot of people have misconceptions about what scientific results mean. Reiterating this stuff and explaining it in accessible terms is a key part of good popular science outreach. You and I might not need it, but you and I are not a representative sample of the audience.

@jo3ywils0n39 2 года назад

@@talideon My point was more about the excessive media sensationalism used in argument to excessive media sensationalism, and less about the information covered. I think the information and content is totally relevant, but the delivery of this material was not for me. Especially when as you said, half the point of the video was that the media overhyped the science involved.

@doukyuuseii99 2 года назад

The science behind fertility is so fascinating. It almost makes me want to see what my count would be, but I don't really need a fertility test because I'm gay.

@tuxedobob2 2 года назад

This jazz tune during the sperm math section is a jam.

@robertm9682 Год назад

a very level-headed analysis. very nice

@Aprilium 2 года назад

Gentlemen! Stop consuming hot stuff from plastic containers, junk food e g: Everything McDonald's, KFC and the likes, high sugar foods, alcoholic drinks and deep fried stuff. Instead consume water, vegetables, fruits and boil your meat rather than deep fry it. Eat as much organic food as possible and avoid processed and packaged food if you can. Finally, exercise! Be blessed.

@hanzo9941 2 года назад

Boiling meat aint great. Using plastic for food is not great as well.

@Aprilium 2 года назад

@@hanzo9941 What do you recommend instead?

@everope 2 года назад

@@Aprilium Grill

@giveussomevodka 2 года назад

Oh for sure, my dude, I will change my entire life and go through 9001 loops every day just so that I will need to have sex 10 times per pregnancy instead of 50.

@locsoluv94 2 года назад

Yeah, boiling just sucks all the nutrients out of food. It's only a good option if you're making soup, because all the nutrients are in the broth. Instead, one can grill, bake, or sautée meats.

@FinancialShinanigan 2 года назад

Meanwhile the East just keeps chugging along.

@karinshedd7334 2 года назад

I did find it...interesting...how the authors of the original 2017 study decided to break up the world into these segments. Check out the study in the description box!

@NosManJr 2 года назад

I heard if you coat the berry's in flower it'll better integrate with the mixture instead of falling to the bottom

@paultaendler3308 2 года назад

Awesome presentation 😁!

@AD-bn6zk 2 года назад

Thank God I'm african ( But I still live in America )

@jigsaw2253 2 года назад

Most families of single mothers in America occurs in African American communities so shut up please

@AD-bn6zk 2 года назад

@@jigsaw2253 well that's another issue but I'm talking about me having kids buddy

@thebigdoghimself 2 года назад

And the world erupts in happiness and new hope for the future.

@samsunglg6671 2 года назад

That impression at the end was very attractive, not too scrappy to me.

@wak3oarder 2 года назад

why is it going lower? are we seeing the effects of this yet in population since we have had a 40 year decline in "count" I know a majority of baby decrease is simply wages and younger couples not feeling comfortable bringing an off spring into poverty are we able to seperate that from "infertility decline"

@immortalideas-fi6kj 2 года назад

Great news for humanity.

@starry2205 2 года назад

I wonder how much female hormones, like those found in birth control, are affecting the sperm issues. Maybe something to do with water contamination by these hormones is affecting men? Or perhaps the mother is exposed to an elevated amount of these hormones during pregnancy, and that influences it

@baw-mq4bt 2 года назад

Yep they don’t want to talk about that though.

@baw-mq4bt 2 года назад

They just blame men for everything

@r3d0c 2 года назад

@@baw-mq4bt lmao what, any evidence for your delusional statements?? any scientific studies?

@__jonbud______________________ 2 года назад

@@r3d0c I'm not agreeing with them, just a heads up that you encourage insults over sharing sources when you start out by admitting a bias and belittling someone (in your case, using the word "delusional" in the first sentence). It's unnecessarily antagonistic and runs counter to any scientific curiosity. Others may make premature or odd conclusions based on the world around them, but you can sometimes get them to point you to the information that led them down that path and learn something you didn't know before (even if you'd still disagree with then afterwards) I mean, it's not like you're dealing with a flat earther (I hope) Just some well-intentioned advice from someone inquisitive and critical.

@thelight3112 2 года назад

There are some chemicals like BPA and PCBs that are appear to your body to be estrogen. They're called xenoestrogens, and exposure to them (e.g. drinking from a plastic water bottle that has BPA) has measurable effects. It is entirely possible that exposure to them could result in lowered sperm count.