Have children of same sex and you are now planning for another child of opposite sex? What are the likely chances, probably not that high, according to a study that investigated the maternal and ...

A massive study of over 58,000 women shows that families may have their own subtle biological bias toward having boys or girls, rather than offspring sex being purely random.

Is your baby’s birth gender pure luck? A new study reveals that maternal age and hidden genetic factors may secretly influence whether you have a boy or a girl.