The more sex you have the more likely you'll have a boy and more girls ...
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Here, a Cambridge professor explores whether fertility really falls off a cliff once a woman reaches 35, how likely it is that…
Here, a Cambridge professor explores whether fertility really falls off a cliff once a woman reaches 35, how likely it is that…
"Hmm, it seems to be a tough year for food. I believe I will have a litter of...females." There's been speculation for decades…
Known as sex ratio adjustment, the idea is that the sex of offspring is not down to a 50:50 chance. Mothers select the sex of…
Call it "sneaky Machiavellian girl power," as the lead researcher does in the Washington Post . His study in PloS One concludes…