Are Women with No Pregnancies At More Risk of Ovarian Cancer?

Women who've never been pregnant are at increased risk for ovarian cancer. While we don't know what causes ovarian cancer per se, we do know that women who've never been pregnant, women who've never given birth to live children, women who have their first child after the age of 30, whether by choice or because of infertility or endomitriosis, are at increased risk for ovarian cancer.

To put it in a positive way, women who have more children are at lower risk, and women who breast feed get an additional bonus benefit, especially if they breast feed each child for a year.