Prolactin is a hormone secreted from the PITUITARY gland to produce breast milk. When Prolactin levels are high, Pitutrary does not secrete FSH + LH hence ovulation does not occur. This happens normally during Lactation. In some women a small pituitary tumour secretes excessive Prolactin resulting in breast milk secretion, scanty menses or no menses and infertility. CABERGOLINE is drug of choice to treat these small adenomas. If the tumour is large (rarely) surgery is required.