title: Effect of fibroids on fertility in patients undergoing assisted reproduction. A structured literature review.
abstract: OBJECTIVE
  The aim of this study is to evaluate the current data to understand the impact of intramural leiomyomata on pregnancy outcome in assisted reproduction.
  
  
  METHODS
  In this review, articles were found by means of computerized Medline and Cochrane Library search using the key words uterine myomata, leiomyomata, fibroids, implantation, pregnancy, infertility and in vitro fertilization. Limitations were English, human, 1990-2002. Inclusion criteria were pregnancy data on in vitro fertilization, intramural myomata with no cavitary distortion and control groups without myomas for each patient with a myoma.
  
  
  RESULTS
  There was a significant negative impact on implantation rate in the intramural myomata groups versus the control groups, 16.4 vs. 27.7% OR 0.62 (0.48-0.8). The delivery rate per transfer cycle was also significantly lower (myomata vs. control), 31.2 vs. 40.9% OR 0.69 (0.50-0.95).
  
  
  CONCLUSIONS
  Our study supports the notion that patients with intramural fibroids have a lower implantation rate per cycle. The studies did not shed new light on the size of intramural myomata that could affect the outcome. In previous failed in vitro fertilization cycles, microsurgical removal of myomata must be considered.
authors.affiliation: Reproductive Biology Unit, Stellenbosch University and Tygerberg Hospital, Tygerberg, South Africa.
authors.forename: C
authors.initials: C
authors.lastname: Benecke
authors.forename: T F
authors.initials: TF
authors.lastname: Kruger
authors.forename: T I
authors.initials: TI
authors.lastname: Siebert
authors.forename: J P
authors.initials: JP
authors.lastname: Van der Merwe
authors.forename: D W
authors.initials: DW
authors.lastname: Steyn
mesh_terms: D000328:Adult; D010064:Embryo Implantation / Q000502:physiology; D005260:Female; D006801:Humans; D007247:Infertility, Female / Q000209:etiology* / Q000503:physiopathology; D007889:Leiomyoma / Q000150:complications*; D011247:Pregnancy; D011256:Pregnancy Outcome; D027724:Reproductive Techniques, Assisted; D014594:Uterine Neoplasms / Q000150:complications*