Excessive prolactin secretion is a not infrequent cause of anovulation and consequent infertility. It is often associated with hypogonadism and amenorrhea or oligomenorrhea. However, mild or moderate hyperprolactinemia is a fairly common finding which is not necessarily associated with oligo-or anovulation. Only hyperprolactinemia causing ovulatory disturbance deserves treatment. If associated with normal ovulation it can safely be ignored as a cause of infertility.