title: Pregnancy rates after embryo transfer depend on the provider at embryo transfer.
abstract: OBJECTIVE
  To evaluate the effect of individual providers on pregnancy outcome after embryo transfer.
  
  
  METHODS
  Retrospective data analysis.
  
  
  METHODS
  University-based tertiary-care assisted reproductive technology program with 10 physician-providers.
  
  
  METHODS
  Six hundred and seventeen women who underwent 854 fresh embryo transfers between January 1996 and January 1999.
  
  
  METHODS
  Pregnancies after embryo transfer were recorded for each provider.
  
  
  METHODS
  Establishment of a clinical pregnancy.
  
  
  RESULTS
  Three hundred ninety-three clinical pregnancies resulted from 854 embryo transfers, for an overall clinical pregnancy rate of 46.0% per embryo transfer. Three hundred forty-seven (40.6%) pregnancies were ongoing. The clinical pregnancy rate varied significantly between providers: for example, 17.0% (47 transfers) vs. 54.3% (57 transfers) (P<.05). Similarly, the ratio of high-grade embryos required to produce a gestational sac differed between providers. The number or quality of embryos transferred did not differ significantly.
  
  
  CONCLUSIONS
  Significant differences were observed in pregnancy rates after embryo transfer done by different providers, suggesting that embryo transfer technique may influence pregnancy outcome in assisted reproductive technology.
authors.affiliation: Walter Reed Army Medical Center and National Institute of Child Health and Human Development, National Institutes of Health, Washington, DC, USA.
authors.forename: R M
authors.initials: RM
authors.lastname: Hearns-Stokes
authors.forename: B T
authors.initials: BT
authors.lastname: Miller
authors.forename: L
authors.initials: L
authors.lastname: Scott
authors.forename: D
authors.initials: D
authors.lastname: Creuss
authors.forename: P K
authors.initials: PK
authors.lastname: Chakraborty
authors.forename: J H
authors.initials: JH
authors.lastname: Segars
mesh_terms: D000328:Adult; D004624:Embryo Transfer; D005260:Female; D006801:Humans; D017063:Outcome Assessment, Health Care; D010819:Physician's Role; D011247:Pregnancy; D018873:Pregnancy Rate; D011446:Prospective Studies