[Post-pill amenorrhea and prolactin].

: 10 patients on combined oral contraception (OC), with ethinyl estradiol and d-norgestrel, were observed to examine prolactin levels during each day of one menstrual cycle. At the end of treatment 4 of the patients underwent a test with thyrotropin-releasing hormone (TRH). The same test was conducted on 7 additional patients affected with postpill amenorrhea. Prolactin level appeared to be normal during OC treatment, and after termination of OC treatment. However, 3 out of the 7 additional patients examined presented a very high prolactin response to stimulation with TRH.