[Clinical and endocrinologic aspects of treatment with pure FSH. A report of experiences].

Ovarian stimulation with pure urinary FSH (Fertinorm, Serono Freiburg, FRG) shows therapeutic efficacy in patients with chronic clomiphene-resistant anovulation and elevated androgen levels. In case of unsatisfactory ovarian response the rate of success can be improved by adding HMG. 20 patients were stimulated for a total of 36 cycles. Cycle monitoring was performed by transbdominal ultrasound and cervical mucus evaluation. Hormone determination (E2, LH, FSH, prolactin, testosterone, DHEAS) was carried out retrospectively. In 17 cycles HMG was added because of insufficient follicle maturation. Upon achieving a dominant follicle with a diameter of more than 1.6 cm (25 cycles, 14 of those with FSH stimulation only) HCG was applied for induction of ovulation. In 22 cycles ovulation occurred. 7 of those revealed sings of luteal phase deficiency. In anovulatory cycles (n = 3) there was a discrepancy between sonography and E2-levels. Premature increase in LH, partly with subsequent luteinization of follicles was observed in 7 of all 36 cycles (19.4%), 2 of those under sole FSH-stimulation. The number of dominant follicles on the day of HCG-application was 1.40 +/- 1.06 (n = 15) in cycles with FSH alone and 2.09 +/- 1.76 (n = 11) in cycles with additional HMG. Hyperstimulation (more than 4 leading follicles) was induced in 9 cycles (5 cycles with FSH only). In 7 (4) cases HCG had to be cancelled. Polyfollicular ovarian reaction and premature increase in LH preferentially occurred in cycles with high basel levels of LH and elevated LH/FSH-ratio.