Various factors can lead to diseases and abnormalities in the ovaries. Absence of ovaries or their abnormal development is uncommon and is often linked to chromosomal irregularities, such as in Turner’s syndrome. Infections like gonorrhea or pelvic inflammatory disease can cause oophoritis, which is inflammation of an ovary. Ovarian cysts, typically noncancerous, are prevalent. Polycystic ovary syndrome results from a hormonal imbalance. Ovarian cancer primarily affects women above 50. About 5 percent of women experience premature menopause due to ovarian failure.