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

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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 ...
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1answer
224 views

Are humans the only species to have permanently enlarged breast?

According to this didyouknowblog (http://didyouknowblog.com/) humans are the only species to have permanently enlarged breast. It quotes an article from the Guardinan ...
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1answer
526 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 ...
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1answer
481 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: ...
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1answer
3k 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 ...
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1answer
4k 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 ...
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391 views

Can a significant human population be started with only one couple? [closed]

Is it scientifically possible to nurture a sustainable human population growth from only one pair of individuals? (For instance two survivors on an island, the biblical Adam and Eve or Noah's family, ...
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1answer
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 ...
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1answer
4k 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 ...
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773 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 ...
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0answers
477 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 ...
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1answer
18k 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 ...
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1answer
491 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 effects on ...
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1answer
766 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 ...
11
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2answers
579 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 ...
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1answer
7k 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. ...
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2answers
3k 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 ...
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1answer
2k 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 ...
3
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1answer
449 views

Can an ovulation calculator increase your likelyhood 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 ...
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1answer
2k 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 ...