Are there any factors that lower women's risk for ovarian cancer?

Birth control pills: Birth control pills lower your lifetime risk of ovarian cancer.

Multiple: Some things you can do something about are taking birth control pills for 5 years or more, maintain a normal weight, eat a diet with plenty of vegetables, bear children, breastfeed, tubal ligation, hysterectomy, avoid taking fertility drugs such as clomid, (clomiphene) not doing hormone replacement therapy (estrogen only) for menopause.