title: [Tubal abnormalities: predisposing factor for extrauterine pregnancy in in-vitro fertilization].
abstract: OBJECTIVE
  Determination of the difference in percentages of ectopic pregnancies in patients with and without tubal pathology after in-vitro fertilisation and consequences for prevention.
  
  
  METHODS
  Thirteen IVF clinics in the Netherlands.
  
  
  METHODS
  The clinics submitted data on clinical and ectopic pregnancies and the indication for IVF from the years 1990 and 1991.
  
  
  RESULTS
  The indication in 1075 cases of IVF-clinical pregnancies was a tubal factor and in 990 cases of IVF-clinical pregnancies another (non-tubal) factor. Percentages of ectopic pregnancies in these groups were 4.5 and 1.1 respectively (significant difference: relative risk: 4.02; 95% confidence interval: 2.10-7.69). One case of heterotopic pregnancy had occurred. No particular type of tubal pathology with high risk for ectopic pregnancy could be identified.
  
  
  CONCLUSIONS
  Preventive salpingectomy before the IVF procedure in patients with a tubal factor is not justified.
authors.affiliation: Academisch Ziekenhuis, afd. Obstetrie en Gynaecologie, Groningen.
authors.forename: D J
authors.initials: DJ
authors.lastname: Tinga
authors.forename: A H
authors.initials: AH
authors.lastname: Simons
mesh_terms: D005184:Fallopian Tube Diseases / Q000150:complications* / Q000453:epidemiology; D005260:Female; D005307:Fertilization in Vitro; D006801:Humans; D009426:Netherlands / Q000453:epidemiology; D011247:Pregnancy; D011271:Pregnancy, Ectopic / Q000453:epidemiology* / Q000209:etiology; D015995:Prevalence; D012306:Risk
vernacular_title: Tuba-afwijkingen: predisponerende factor voor extra-uteriene graviditeit bij in vitro-fertilisatie.