Induction of ovulation by prolonged pulsatile administration of luteinizing hormone releasing hormone (LRH) in patients with clomiphene resistant polycystic ovary-like disease.

Induction of ovulation with pulsatile administration of LRH by automatic portable infusion pump for 74 and 147 consecutive days in 2 patients with clomiphene resistant PCO-like disease is described. The patients exhibited 6 ovulatory cycles. One patient conceived during the fourth cycle. During the treatment a unilocular cyst, probably a lutein cyst, developed in one patient, but subsequently disappeared spontaneously under uninterrupted therapy. No chemical hyperstimulation was observed. Follicular phases lasted for 32 and 13 days in patient I and for 19, 25, 14 and 22 days in patient II. Luteal phases lasted for 16 and 15 days in patient I and for 17, 18 and 15 days, respectively in patient II. Total urinary oestrogen and pregnanediol excretion did not differ from that seen in normal cycles. LH baseline and peak values and LH responses declined to normal levels accompanied by a normalization of the LH/FSH ratio during pulsatile LRH treatment in both patients. The first pre-ovulatory episode occurred already after partial normalization of the LH/FSH ratio. The endocrinology of the second LRH induced cycles of patients I and II was not different from cycles similarly induced in hypogonadotrophic patients. We conclude that ovulation induction with pulsatile LRH administration in patients with clomiphene resistant PCO-like disease is possible. Our findings give hope that this mode of treatment may not only be effective, but may prove to be safer than ovulation induction with menopausal gonadotrophins in patients with clomiphene resistant PCO-like disease.