Male fetuses' sex hormones can affect female siblings before they're even born : Shots - Health News : NPR

The Science of Siblings is a new series exploring the ways our siblings can influence us, from our money and our mental health all the way down to our very molecules. We'll be sharing these stories over the next several weeks...

https://www.npr.org/sections/health-shots/2024/04/09/1240906149/siblings-womb-brothers-sisters-sex-hormones