116 votes
Accepted

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

Support for the claim appears to rest on explicit birth records, although interviews with families in the village were also conducted. The New York Post writes (emphasis mine) According to birth ...
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  • 11.1k
40 votes

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

Generally if such statistics would exist, they would be available to every Polish citizen per freedom of information act. Alas, there are no such statistics in Poland. While the claim might be true, ...
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  • 421
21 votes
Accepted

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

No, it takes more than one sperm. The egg has multiple barriers which take up to 100 sperm, co-operating, to penetrate. The fusion of the egg with its three barriers (cumulus-oocyte complex, zona ...
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  • 22.6k
15 votes
Accepted

Is melatonin used as a contraceptive in Europe?

"Europe" is rather larger and more diverse than Americans sometimes think - medical practice, and medicine availability, is different in the UK than in France, and different again in the ...
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  • 5,952
14 votes

Are humans the only species to have permanently enlarged breast?

Yes. Homo sapiens is, as far as we know, the only species that has permanently enlarged breasts. In the rest of the primates, plump breasts last only as long as breastfeeding does: Humans are the ...
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  • 1,566
14 votes
Accepted

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

This says that the claim is a "popular Greek view" followed by Aristotle: Contrary to a popular Greek view, which regarded the father alone as providing seed, a view that would be followed by ...
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  • 26.3k
13 votes

Can someone get pregnant merely by using the swimming pool?

According to American Pregnancy it looks really improbable. Similar statements are made on the Oakland University website and on this website about contraception (which explicitly states it's ...
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  • 375
10 votes

Is possible for male human to breast feed?

Yes it is possible. See Father's Milk Discover February 1995. We’ve known for some time that many male mammals, including some men, can undergo breast development and lactate under special ...
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  • 99.4k
10 votes

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

This is not my area of scientific expertise. I cannot say if this study by Wilder et al is correct or not, but I can read the study and compare their conclusions to Baumeister's. Wilder et al ...
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9 votes

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

This is absolutely true. The theory is called Preformationism, and was widely (though not exclusively) believed in some form from Ancient Greek times until the 17th century. Pythagoras and Aristotle ...
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  • 54.8k
7 votes

Is melatonin used as a contraceptive in Europe?

Melatonin has certainly been tested in contraceptive pills in Europe, as the Washington Post (1995) reports: Now Applied Medical Research Ltd., a fledgling drug company in Fairfax, hopes to change ...
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  • 23.3k
7 votes

Does orgasm trigger menstruation?

No. And actually, there is no claim. That is just a misunderstanding. And one that does not make any sense in terms of human reproductive functions. If orgasm would trigger menstruations way out of ...
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  • 43.5k
4 votes
Accepted

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

Induction of labour in women with intact membranes reduces the risk of caesarean section. Per a systematic review and meta-analysis of trials in women with intact membranes in 2014 by Wood S et.al. ...
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  • 22.6k
4 votes

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

The woman's biorhythm cycle which is the primary basis for Smart Storks unique gender selection program is described by scientists to be pseudoscience and also an examination of 134 biorhythm studies ...
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  • 22.6k
4 votes

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

In humans, the X-bearing sperm has 2.8% more total DNA than Y-bearing sperm. Thus, when stained with a DNA-specific fluorochrome, the fluorescent signal emitted by an X-bearing sperm is greater than ...
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  • 22.6k
4 votes
Accepted

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

Research referred by Emily Martin in her 1991 paper 'The Egg and the Sperm: How Science Has Constructed a Romance Based on Stereotypical Male Female Roles' show that the sperm and egg are mutually ...
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  • 22.6k
3 votes

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

The idea that a man contributed the seed and a woman was a "container" was prevalent in the ancient world, as it has been noted above. It's even part of Apollo's main argument in the final play of ...
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  • 7,300
1 vote

Is melatonin used as a contraceptive in Europe?

Not in Sweden, Melatonin is used for sleep problems. This (pdf) Melatonin leaflet mentions Women of childbearing potential should use contraception during treatment. However, Melatonin Orifarm may be ...
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  • 2,588
1 vote

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

Sperm are intricately adapted to existing alongside millions of their peers at all times, but is simply unknown if they can survive and achieve success without these peers. There simply is not enough ...
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  • 1,354

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