1mIu/l=0.04717ng/ml, ng/ml is an international unit, and different hospitals may use different units and different values. When a woman has a menstrual disorder, the level of prolactin can be measured by sex hormones to reflect the hormonal changes in the body. In a normal woman who is not pregnant, prolactin is between 3 and 30 ng/ml, but when she has a prolactinoma prolactin can be extremely high, reaching more than 1000 ng/ml. Prolactin is a peptide hormone synthesized and secreted by the prolactin cells of the pituitary gland. If the value of prolactin is too high, bromocriptine can be given for treatment.