title: Effect of endometriosis on in vitro fertilization.
abstract: OBJECTIVE
  To investigate the IVF outcome for patients with endometriosis.
  
  
  METHODS
  Meta-analysis.
  
  
  METHODS
  Academic research center.
  
  
  METHODS
  A MEDLINE search and review of the literature were performed. Patients were classified by level of endometriosis, and controls were classified according to the indication for IVF.
  
  
  METHODS
  Bivariate analysis and multivariate logistic regression was used to estimate overall effect and control for confounding.
  
  
  METHODS
  Pregnancy rates, fertilization rate, implantation rates, and numbers of oocytes retrieved.
  
  
  RESULTS
  Twenty-two published studies were included in the overall analysis. The chance of achieving pregnancy was significantly lower for endometriosis patients (odds ratio, 0.56; 95% confidence interval, 0.44-0.70) when compared with tubal factor controls. Multivariate analysis also demonstrated a decrease in fertilization and implantation rates, and a significant decrease in the number of oocytes retrieved for endometriosis patients. Pregnancy rates for women with severe endometriosis were significantly lower than for women with mild disease (odds ratio, 0.60; 95% confidence interval, 0.42-0.87).
  
  
  CONCLUSIONS
  Patients with endometriosis-associated infertility undergoing IVF respond with significantly decreased levels of all markers of reproductive process, resulting in a pregnancy rate that is almost one half that of women with other indications for IVF. These data suggest that the effect of endometriosis is not exclusively on the receptivity of the endometrium but also on the development of the oocyte and embryo.
authors.affiliation: Center for Reproductive Medicine and Surgery, University of Pennsylvania Medical Center and Health System, Philadelphia, Pennsylvania, USA. kbarnhart@mail.obgyn.upenn.edu
authors.forename: Kurt
authors.initials: K
authors.lastname: Barnhart
authors.forename: Rebecca
authors.initials: R
authors.lastname: Dunsmoor-Su
authors.forename: Christos
authors.initials: C
authors.lastname: Coutifaris
mesh_terms: D000328:Adult; D002452:Cell Count; D010064:Embryo Implantation; D004715:Endometriosis / Q000503:physiopathology*; D005260:Female; D005306:Fertilization; D005307:Fertilization in Vitro; D006801:Humans; D009865:Oocytes / Q000166:cytology; D011247:Pregnancy; D018873:Pregnancy Rate; D012720:Severity of Illness Index; D020858:Tissue and Organ Harvesting