title: The association between chorionic villus sampling and preeclampsia.
abstract: OBJECTIVE
  To determine whether an association exists between prenatal diagnostic procedures and preeclampsia.
  
  
  METHODS
  All women who underwent invasive prenatal diagnosis and were not at high risk for preeclampsia were identified during a 15-month period and matched by age with women who had not had invasive prenatal diagnosis. The association between prenatal diagnosis [amniocentesis and chorionic villus sampling (CVS)] and the development of preeclampsia was assessed in univariable and multivariable analyses.
  
  
  RESULTS
  Six-hundred and fifty-three women who underwent prenatal diagnosis (501 by amniocentesis and 152 by CVS) were matched by age with 653 women who did not undergo the test. In multivariable analysis, the factors that remained significantly associated with preeclampsia were (1) maternal age less than 25 years (OR 7.4, 95% CI 23.3-23.6); (2) nulliparity (OR 2.7, 95% CI 1.1-6.9); and (3) having had a CVS as a nulliparous woman (OR 4.2, 95% CI 1.4-12.6).
  
  
  CONCLUSIONS
  These data suggest that CVS is associated with the subsequent development of preeclampsia in nulliparous women; this relationship should be confirmed in further studies.
authors.affiliation: Department of Obstetrics and Gynecology, Northwestern University Feinberg School of Medicine, Chicago, IL, USA. w-grobman@northwestern.edu
authors.forename: William A
authors.initials: WA
authors.lastname: Grobman
authors.forename: Melissa
authors.initials: M
authors.lastname: Auger
authors.forename: Lee P
authors.initials: LP
authors.lastname: Shulman
authors.forename: Sherman
authors.initials: S
authors.lastname: Elias
mesh_terms: D000328:Adult; D000649:Amniocentesis / Q000009:adverse effects*; D015193:Chorionic Villi Sampling / Q000009:adverse effects*; D015331:Cohort Studies; D005260:Female; D005865:Gestational Age; D006801:Humans; D007087:Illinois / Q000453:epidemiology; D016017:Odds Ratio; D011225:Pre-Eclampsia / Q000453:epidemiology / Q000209:etiology*; D011247:Pregnancy; D011256:Pregnancy Outcome; D055815:Young Adult