Your baby's sex isn't random. A study shows what could influence it. The Washington PostYour chance of having a boy or girl may not be 50/50 New ScientistIt's a girl — again! And again! Why a baby's sex isn't random. MSNA child's biological sex may not always be a random 50-50 chance Science NewsHaving only boys or girls sometimes runs in the family. Here's why BBC Science Focus Magazine
