Why do some moms have more boys than girls—or vice versa? New study provides clues
Saturday, July 19, 2025 - 13:26
in Psychology & Sociology
At first glance, the sex of your unborn child seems like it should be a coin toss: Most sperm carry either an X or a Y chromosome, giving the baby a roughly one-in-two chance of being biologically male or female. But some families are lopsided. Reality TV star Kris Jenner, for instance, has five daughters and one son; former Spice Girl Victoria Beckham has three sons and one daughter. A study published today in Science Advances suggests that, far from a “coin toss,” some mothers may be biologically biased toward having children of one sex or another , with the effect seemingly increasing with age of first pregnancy and the number of children they...