title: Evidence that exclusive use of Follistim may produce better pregnancy results than the use of Gonal-F following in vitro fertilization (IVF) - embryo transfer (ET).
abstract: OBJECTIVE
  To evaluate whether the equal mixture of human menopausal gonadotropin (hMG) to recombinant (r) follicle stimulating hormone (FSH) for controlled ovarian hyperstimulation (COH) adversely affects outcome following in vitro fertilization (IVF). Furthermore, to determine if the specific rFSH preparation used has any differing effects on outcome.
  
  
  METHODS
  Retrospective study of women using the luteal phase leuprolide acetate-gonadotropin COH regimen. Outcome measures included clinical and viable pregnancy rates (PRs) and implantation rates.
  
  
  RESULTS
  The clinical and viable PRs and implantation rates were significantly lower in the group receiving exclusively Gonal-F. Addition of hMG to the treatment protocol not only did not lower the PRs further, but in fact seemed to obviate the adverse effect of Gonal-F.
  
  
  CONCLUSIONS
  Since exclusive use of Gonal-F did not adversely affect fertilization rates or quality of embryos we suspect its exclusive use in some way makes the uterine environment less receptive.
authors.affiliation: The University of Medicine and Dentistry of New Jersey, Robert Wood Johnson Medical School at Camden, Cooper Hospital/University Medical Center, Department of Obstetrics and Gynecology, Camden, New Jersey, USA.
authors.forename: M
authors.initials: M
authors.lastname: Check
authors.forename: C
authors.initials: C
authors.lastname: Wilson
authors.forename: J H
authors.initials: JH
authors.lastname: Check
authors.forename: D
authors.initials: D
authors.lastname: Kiefer
authors.forename: J K
authors.initials: JK
authors.lastname: Choe
mesh_terms: D000328:Adult; D004624:Embryo Transfer; D005260:Female; D005307:Fertilization in Vitro; D005640:Follicle Stimulating Hormone / Q000494:pharmacology*; D043373:Follicle Stimulating Hormone, Human; D006801:Humans; D011247:Pregnancy; D011256:Pregnancy Outcome; D011994:Recombinant Proteins / Q000494:pharmacology*; D012189:Retrospective Studies
chemical_list: D043373:Follicle Stimulating Hormone, Human; D011994:Recombinant Proteins; D005640:Follicle Stimulating Hormone