title: Ectopic pregnancy rates with frozen compared with fresh blastocyst transfer.
abstract: OBJECTIVE
  To compare the rate of ectopic pregnancy (EP) with fresh versus frozen blastocyst transfer in our program during the same time period.
  
  
  METHODS
  Retrospective analysis.
  
  
  METHODS
  University IVF program.
  
  
  METHODS
  Women who achieved a clinical pregnancy after IVF between 1998 and 2005.
  
  
  METHODS
  In our program, cryopreservation is performed at the blastocyst stage. Embryo transfer was performed 1 to 1.5 cm short of the fundus by abdominal ultrasound guidance.
  
  
  METHODS
  The incidence of EP was examined in relation to fresh versus frozen blastocyst transfer.
  
  
  RESULTS
  In the frozen blastocyst group, there were 5 EPs out of 180 clinical pregnancies (2.8%), and there were 10 EPs out of 564 clinical pregnancies (1.8%) in the fresh blastocyst group.
  
  
  CONCLUSIONS
  The rate of EP is not significantly increased after the transfer of frozen thawed blastocysts compared with fresh blastocyst transfer.
authors: Department of Obstetrics and Gynecology, Stanford University School of Medicine, Stanford, California 94304, USA.
authors: Sunny H
authors: SH
authors: Jun
authors: Amin A
authors: AA
authors: Milki
mesh_terms: D000328:Adult; D004624:Embryo Transfer / Q000706:statistics & numerical data*; D005184:Fallopian Tube Diseases / Q000453:epidemiology; D005260:Female; D005615:Freezing; D006801:Humans; D010062:Ovulation Induction; D011247:Pregnancy; D011271:Pregnancy, Ectopic / Q000453:epidemiology*