atans1

Boy sperm swim better but gal sperm smarter

In Uncategorized on 01/01/2019 at 4:53 am

Gal sperm outlive boy sperm.

One popular theory is that the odds of having a girl increase by having sex several days before ovulation and then abstaining so that the female sperm, which live longer, but swim more slowly than male sperm, outlast their counterparts.

Conversely, if sex happens closer to ovulation or after it, the best swimmers get to the egg first and boys are produced.

Parents may swear by these techniques, but scientists say there is little evidence they make any difference.

There is also some research which suggests parental stress could lead to the birth of more girls, while living through wars and conflicts may give rise to more male conceptions.

https://www.bbc.com/news/health-46597323

 

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