I'm having irregular menstrual cycle. i'm having my period about every 2 months what is the problem mentioning that my sister has polycystic ovaries?

Anovulation: This kind of bleeding occurs when someone is not ovulating. Schedule a visit with your doctor and ask to be tested for polycystic ovarian syndrome. Birth control pills would likely regulate your cycle.

Unsure: It is possible that you also have pcos, but without a complete history and physical exam the definitive diagnosis is not possible. You should see your doctor for evaluation.