title: Extended induction of ovulation by human menopausal gonadotropins and a gonadotropin-releasing hormone analog in high responders for in vitro fertilization and oocyte donation.
abstract: OBJECTIVE
  To examine the efficacy of extending ovulation induction for the in vivo maturation of oocytes.
  
  
  METHODS
  Fifty-nine high responders underwent 72 in vitro fertilization (IVF) cycles with a conventional protocol of human menopausal gonadotropin and a gonadotropin-releasing hormone analog. These patients donated oocytes to 81 recipients. The same 59 patients underwent 90 subsequent cycles in which the duration of induction was extended by two to three days. The oocytes were also donated to 138 patients.
  
  
  RESULTS
  With the extended protocol, significantly more oocytes were retrieved (29.1 vs. 20.6), and a greater proportion of them were mature. Fertilization rates were significantly higher for both donors (67.7% vs. 36.2%) and recipients (67.5% vs. 47.1%). Conception rates were also significantly higher for both donors (24.4% vs. 11.1%) and recipients (38.4% vs. 24.7%).
  
  
  CONCLUSIONS
  Extending the duration of ovulation induction in high responders is associated with in vivo maturation of oocytes and improved success rates in IVF and ovum-donation programs.
authors.affiliation: In Vitro Fertilization/Embryo Transfer Unit, Serlin Maternity Hospital, Tel Aviv Sourasky Medical Center, Sackler Faculty of Medicine, Tel Aviv University, Israel.
authors.forename: A
authors.initials: A
authors.lastname: Amit
authors.forename: Y
authors.initials: Y
authors.lastname: Yaron
authors.forename: F
authors.initials: F
authors.lastname: Azem
authors.forename: M R
authors.initials: MR
authors.lastname: Peyser
authors.forename: M P
authors.initials: MP
authors.lastname: David
authors.forename: J B
authors.initials: JB
authors.lastname: Lessing
mesh_terms: D000281:Administration, Intranasal; D000328:Adult; D006063:Chorionic Gonadotropin; D004624:Embryo Transfer / Q000592:standards*; D004958:Estradiol / Q000097:blood; D005260:Female; D005300:Fertility Agents, Female; D005307:Fertilization in Vitro / Q000592:standards*; D007987:Gonadotropin-Releasing Hormone / Q000031:analogs & derivatives*; D006801:Humans; D008596:Menotropins; D008875:Middle Aged; D018587:Oocyte Donation / Q000592:standards*; D010062:Ovulation Induction / Q000379:methods*; D011247:Pregnancy; D018873:Pregnancy Rate; D011374:Progesterone
chemical_list: D006063:Chorionic Gonadotropin; D005300:Fertility Agents, Female; D007987:Gonadotropin-Releasing Hormone; D011374:Progesterone; D004958:Estradiol; D008596:Menotropins