Women with Heart Disease More Likely to Have Baby Girls, Study Finds

Pregnant women with heart disease are more likely to give birth to girls than boys, according to a new study from Iran.

The study involved 200 pregnant women diagnosed with heart disease who were referred to a heart center for delivery. Of the 216 children born to these women, 75 percent were girls.

The number of boys born in any human population should be similar to the number of girls born, but the boy-to-girl ratio in any given country can vary depending on practices of sex selection. In Iran, about 105 boys are born for every 100 girls, according to the Central Intelligence Agency. In the heart disease study, 32 boys were born for every 100 girls.