My sister has cysts in ovary which results into infertility.she had no monthly periods from last 1 and half year.please suggest, she want to concieve?

See doctor: If your sister has no period for 18 months, then she definitely needs to see a physician. Women who aren't cycling are often at increased risk for endometrial cancer if they have, as you say, pcos (polycystic ovarian syndrome). For your sister's health, make sure she sees a doctor. Infertility may be one issue, but preventing cancer is another one she needs to consider.