title: Further characterization of the luteal phase inadequacy after gonadotrophin-releasing hormone agonist-induced ovulation in gonadotrophin-stimulated cycles.
abstract: To characterize further the luteal phase ensuing gonadotrophin-releasing hormone agonist (GnRHa)-induced ovulation in exogenous gonadotrophin-stimulated cycles, plasma progesterone concentrations on luteal days +2 and +8 were determined in 20 patients (group 1) receiving one s.c. 0.5 mg injection of the GnRHa leuprolide acetate and in 10 patients (group 2) receiving two doses 12 h apart in multifollicular cycles stimulated with highly purified follicle-stimulating hormone (FSH). The patients received luteal support with micronized vaginal progesterone from day +2 (after sampling for plasma progesterone determination) until the onset of menses. The duration of the luteal phase was also assessed. As a control group, we included five fertile women who underwent plasma progesterone determinations on days +2 and +8 according to the luteinizing hormone peak in their spontaneous ovulatory cycles. On day +2, plasma progesterone concentrations were significantly higher in groups 1 and 2 than in the controls. However, on day +8, the mean plasma progesterone concentration and the average progesterone concentration per pre-ovulatory follicle were significantly higher in the control women than in groups 1 and 2. Furthermore, 13 patients (65%) in group 1 and seven patients (70%) in group 2 had plasma progesterone concentrations < 2 SD below the mean value obtained in the controls on that post-ovulatory day. Percentage increments in the plasma progesterone concentration from day +2 to day +8 were significantly lower in groups 1 and 2 than in the control group of spontaneous ovulatory cycles.(ABSTRACT TRUNCATED AT 250 WORDS)
authors.affiliation: Department of Obstetrics and Gynecology, Faculty of Medicine, University of Barcelona, Hospital Clínic i Provincial, Spain.
authors.forename: J
authors.initials: J
authors.lastname: Balasch
authors.forename: F
authors.initials: F
authors.lastname: Fábregues
authors.forename: R
authors.initials: R
authors.lastname: Tur
authors.forename: M
authors.initials: M
authors.lastname: Creus
authors.forename: R
authors.initials: R
authors.lastname: Casamitjana
authors.forename: J
authors.initials: J
authors.lastname: Peñarrubia
authors.forename: P N
authors.initials: PN
authors.lastname: Barri
authors.forename: J A
authors.initials: JA
authors.lastname: Vanrell
mesh_terms: D000328:Adult; D016022:Case-Control Studies; D005260:Female; D007987:Gonadotropin-Releasing Hormone / Q000819:agonists*; D006062:Gonadotropins / Q000627:therapeutic use*; D006801:Humans; D007247:Infertility, Female / Q000097:blood / Q000188:drug therapy*; D008183:Luteal Phase / Q000187:drug effects*; D010062:Ovulation Induction / Q000379:methods*; D011374:Progesterone / Q000097:blood; D011446:Prospective Studies; D013268:Stimulation, Chemical
chemical_list: D006062:Gonadotropins; D007987:Gonadotropin-Releasing Hormone; D011374:Progesterone