Questions tagged [human-reproduction]

Any form of sexual reproduction resulting in the conception of a child.

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4 votes
1 answer
547 views

Is prolonged/frequent use of mobile phones responsible for sperm reduction in younger men?

This question has been asked previously but there has been a new study on the question which has received publicity and considerable acceptance. I am skeptical of the findings of the new study. Men ...
5 votes
1 answer
15k views

Can drinking coconut water harm sperm production?

In a remote rural area of India while traveling, I came to know that the people there believe that Coconut water should not be drunk by males as it harms sperm production [count?]. Is there truth ...
5 votes
3 answers
1k views

Is melatonin used as a contraceptive in Europe?

On Episode 515 of the Wellness Mama podcast, Dr. Michael J. Breus made the statement that melatonin is used for birth control in Europe: Melatonin in Europe is used as a contraceptive. Let me say ...
17 votes
2 answers
2k views

Are sperm counts in men decreasing significantly?

It is widely believed that sperm counts in men are suffering a significant decline over the last century (e.g. see this article in the Independent which assumes the decline is happening and the only ...
8 votes
0 answers
3k views

When using a Known Sperm Donor is natural insemination (sex) more effective than artificial insemination?

There is a community of known sperm donors, who are met by women wanting to get pregnant and provide them sperm without involving a doctor. Inside of this community a common debate is the difference ...
4 votes
1 answer
895 views

Is a woman more likely to get pregnant by a sperm containing an X chromosome than an Y chromosome?

MedicalDaily writes in Male Fertility 101: 7 Little-Known Facts About Sperm For Men's Health: Not all sperm are chromosomally male. Several sperm do carry the X chromosome, while others carry the Y ...
3 votes
0 answers
215 views

Are HIV positive couples in China denied assisted reproduction methods?

In the following article on Xinhuanet, it is claimed that HIV carriers are not allowed access to assisted reproduction in China. http://www.xinhuanet.com/english/2019-01/21/c_137762633.htm As ...
3 votes
1 answer
941 views

Can an ovulation calculator increase your likelihood of getting pregnant?

An ovulation calculator is something that apears on most pregnancy and baby sites on the internet. Searching for the term "ovulation calculator" on Google produces over 2 million results. This "tool"...
57 votes
2 answers
19k views

Have only girls been born for a long time in this village?

German media has reported that a village in Poland has had only girls born for the last decade: The head of the parish promises a reward, the Catholic village priest asks for God's help: In the ...
18 votes
1 answer
11k views

Does orgasm trigger menstruation?

Wikipedia states, without a particularly satisfying source, that: Some sources say that achieving orgasm helps the uterus contract and expel the lining. It does quote some other opinions there, ...
10 votes
1 answer
620 views

Is possible for male human to breast feed?

There are some stories circling around about man breast feeding. Humboldt wrote about it. What is know about this? Is this really lactation?
4 votes
1 answer
380 views

Is the egg much more active during conception than commonly assumed?

David H. Freedman writes in New Theory on How The Aggressive Egg Attracts Sperm: As they mill around, the egg selects one and reels it in, pinning it down in spite of its efforts to escape. It’s no ...
17 votes
1 answer
9k views

Of all humans ever born, did most men not become fathers?

I quote in full a passage from the book Is There Anything Good About Men?: How Cultures Flourish by Exploiting Men by Roy Baumeister, pages 63 – 64: Counting Ancestors Let’s return now to the ...
13 votes
3 answers
2k views

Did classical Greeks claim that children are solely products of the father's sperm?

I just read on a site about Greek mythology: It may seem odd for Metis to have been pregnant with Athena but, never mentioned as her mother. This is because the classic Greeks believed that ...
18 votes
2 answers
6k views

Can a single sperm travel alone to an egg and fertilize it?

WebMD writes in its Sperm FAQ: It takes just one sperm to fertilize an egg and achieve a pregnancy, but for each sperm that reaches and fertilizes an egg, there are millions that don't. Parenting....
16 votes
1 answer
10k views

Are humans the only species to have permanently enlarged breast?

According to this did you know? blog humans are the only species to have permanently enlarged breast. It quotes an article from the Guardian but the article does not contain that specific fact.
10 votes
1 answer
7k views

Does pre-ejaculate typically contain sperm?

It is typically believed that pre-ejaculate contains sperm, for example Guys leak a bit of sperm out of the penis before ejaculation. This is called pre-ejaculate. source Does a man's pre-...
18 votes
0 answers
1k views

Are most women incapable of orgasm through vaginal stimulation alone?

In Wikipedia's article of Orgasm it suggests vaginal stimulation isn't sufficient for women's sexual pleasure: Kinsey found that most of the women he surveyed could not have vaginal orgasms.[59] He ...
20 votes
1 answer
4k views

Can someone get pregnant merely by using the swimming pool?

This Daily Mail story says that a woman went to court as her daughter got pregnant by swimming. A mother is suing a hotel claiming her teenage daughter fell pregnant simply from using a hotel ...
7 votes
2 answers
671 views

Does inducing labour increase the risk that a C-section is required?

It seems that there is conflicting evidence on whether inducing labour causes an increase in the likelihood that a caesarian section becomes medically necessary. Let me quote two authorities: British ...
5 votes
1 answer
984 views

Can biorhythms and pH fluctuations be used to select the gender of a child?

Smart Stork claim to be able to help couples select the gender of their future child: Our success rate in gender selection? Is still over 95%! Their technique relies of biorhythms: Smart Storks ...
3 votes
1 answer
18k views

Does eating sour increase the chance that your children will be female?

I don't know about you, but I heard this one day. It was because I was sucking lemons, and someone was like, "Why do you suck lemons, isn't it soooo sour?". I said it was very sour, but I liked sour. ...
8 votes
0 answers
327 views

Does the availability of modern contraception only explain 10% of human fertility reduction?

It is widely assumed that the most important factor leading to large family sizes and fast population growth is the lack of availability of contraception. But Tim Worstall's book Chasing Rainbows ...
2 votes
0 answers
121 views

Is there a non-ionizing, non-heating mechanism by which cell phones can damage sperm? [closed]

I'm aware that a similar question has been asked before, but I'm hoping my questions are different enough to warrant a new post. Does the presence of a cellphone affect sperm count or heart rate? I ...
23 votes
1 answer
3k views

Does using a laptop on your lap lower your sperm count?

It is sometimes claimed that using a laptop on or in proximity of testicles can result in a lower sperm count. This Health.com article claims: Can a laptop computer really affect a man’s ability to ...
14 votes
1 answer
48k views

Do sperm that carry male chromosomes swim faster?

The claim is that human sperm has different physical characteristics (i.e. phenotype) depending on whether it is carrying an X or Y chromosome. One theory is that sperm that carry the male ...
4 votes
1 answer
2k views

Does avoiding ejaculation before conceiving help in healthier and stronger children?

I have read this from friends and is mostly around in subcontinent that in order to get healthier babies (with no defects and good health), one should avoid ejaculation for a couple of days before ...
14 votes
0 answers
700 views

Do excreted oral contraceptive compounds in drinking water contribute to male infertility?

I've run across several claims about oral contraceptives ("the pill") and how the residuals that enter municipal water supplies via urination cannot be filtered out and may have detrimental ...
11 votes
1 answer
812 views

Are there more American houses with dogs than with children?

David Brooks, in his article published today in The New York Time, has claimed "There are now more American houses with dogs than with children." I seriously doubt this claim is true, especially ...
5 votes
1 answer
8k views

Can a woman become pregnant through splash pregnancy?

I have read that there is something called "splash pregnancy" which is when you get pregnant without having penetration. So far I have only found anecdotal stories about it, but is there any ...
15 votes
2 answers
4k views

Does riding a bicycle reduce sperm count/male fertility?

Related Does using a laptop on your lap lower your sperm count? Can switching from briefs to boxer shorts improve your fertility? I've heard that riding a bicycle, especially for extended periods of ...
22 votes
1 answer
5k views

Does diet affect the taste of semen?

After reading the latest explosm comic I realized that I often heard about this claim, but never read anything drawing from credible sources. Eating pineapples makes semen taste better. On the ...
10 votes
0 answers
969 views

Does sexual position affect the chances of conception?

I have seen the claim that some sexual positions are better for getting pregnant than others. For example this article on how to have baby-making sex claims: Be a missionary It might seem ...
17 votes
1 answer
1k views

Are 99% of sperm 'kamikaze', as described by Robin Baker?

From the book Sperm Wars, by Robin Baker: Very few (less than 1 per cent) of the sperm in a human ejaculate are the elite, fertile 'egg-getters'. The remainder are infertile 'kamikaze' sperm whose ...
22 votes
1 answer
3k views

Can switching from briefs to boxer shorts improve your fertility?

The advice to wear boxer shorts instead of briefs seems reasonable at first glance, since for testes to produce sufficient quality and quantity of sperm, the temperature of testes must be lower ...