A recent Harvard study on over 58,000 US nurses’ birth records suggests that families with three or more children are more prone to having all boys or all girls, challenging the common belief in equal gender odds. The research shows that families with three boys have a 61% chance of the fourth child being male, while families with three girls have a 58% chance of another girl. The study also indicates a correlation between parental age and the likelihood of having children of the same gender. Women over 29 starting to have kids are 13% more likely to have all children of the same sex. The findings raise questions about conception odds and shed light on potential factors influencing gender outcomes.
