title: Pulsatile gonadotrophin releasing hormone stimulation after medium-term pituitary suppression in polycystic ovary syndrome.
abstract: Ovulation induction in the polycystic ovary syndrome with pulsatile gonadotrophin releasing hormone (GnRH) in the recovery phase after treatment with a GnRH agonist (GnRHa) during 6-8 weeks has been reported to improve ovulation and pregnancy rates and to normalize follicular phase luteinizing hormone (LH) levels. We studied the results of stimulation with pulsatile GnRH after a shorter 'medium-term' period of 3 weeks of treatment with a GnRHa by comparing a cycle without GnRHa pre-treatment with a cycle with GnRHa (post-GnRHa) pre-treatment in 12 patients. We could prove no significant clinical improvement in post-GnRHa cycles. Ovulation rates were similar. However, in the post-GnRHa cycles, two ongoing pregnancies were observed versus one spontaneous abortion in the cycles without GnRHa pre-treatment. This observation might be explained by the fact that follicular phase LH levels in post-GnRHa cycles were significantly decreased.
authors.affiliation: Department of Obstetrics and Gynaecology, Free University Hospital, Amsterdam, The Netherlands.
authors.forename: F
authors.initials: F
authors.lastname: Scheele
authors.forename: P G
authors.initials: PG
authors.lastname: Hompes
authors.forename: M
authors.initials: M
authors.lastname: van der Meer
authors.forename: E
authors.initials: E
authors.lastname: Schoute
authors.forename: J
authors.initials: J
authors.lastname: Schoemaker
mesh_terms: D000328:Adult; D002064:Buserelin / Q000008:administration & dosage / Q000627:therapeutic use; D005260:Female; D005498:Follicular Phase / Q000502:physiology; D007987:Gonadotropin-Releasing Hormone / Q000008:administration & dosage* / Q000627:therapeutic use; D006801:Humans; D007986:Luteinizing Hormone / Q000097:blood; D006080:Ovarian Follicle / Q000503:physiopathology; D010053:Ovary / Q000000981:diagnostic imaging; D010062:Ovulation Induction; D010507:Periodicity; D011085:Polycystic Ovary Syndrome / Q000000981:diagnostic imaging / Q000188:drug therapy* / Q000503:physiopathology; D011247:Pregnancy; D014463:Ultrasonography
chemical_list: D007987:Gonadotropin-Releasing Hormone; D007986:Luteinizing Hormone; D002064:Buserelin