Harvard researchers find link between mother's age, child's sex | NYGazet

A new Harvard study looks into what determines sex at birth. One surprising finding: the older the mom, the more likely she is to have multiple children of the same sex.

“I was wondering whether it’s just pure chance or if there was some special biology underlying this phenomenon,” said Wang, a PhD student in nutritional epidemiology at the Harvard T.H. Chan School of Public Health. Growing up, Siwen Wang was curious... [5933 chars]