title: An epidemiological study of obstetric ultrasound examinations in Denmark 1989-1990.
abstract: OBJECTIVE
  To provide an epidemiological description of the use of ultrasound in obstetrics in Denmark and to analyse whether screening per se reduces the mean number of obstetric ultrasound examinations for all pregnant women.
  
  
  METHODS
  Questionnaire study based on hospital records and patient interviews.
  
  
  METHODS
  All Danish hospital departments with delivery services (n = 57).
  
  
  METHODS
  2268 women who gave birth to a child in a two week period February 1990.
  
  
  RESULTS
  The main findings of the study are: 1) Women with an offer of screening had a significantly higher mean number of obstetric ultrasound examinations during pregnancy (1.8) than women without (1.3), no matter at which type of department they had antenatal care and their delivery; 2) 45% of the women without an offer of screening had an ultrasound examination on indication in the interval of 14-20 weeks of gestation--at which time an examination may include what is performed at a screening examination and 3) The study shows great regional variations in the use of ultrasound in obstetrics.
  
  
  CONCLUSIONS
  The results question the presumption that screening per se will reduce the mean number of ultrasound examinations during pregnancy.
authors.affiliation: Danish Institute for Clinical Epidemiology, Copenhagen.
authors.forename: F S
authors.initials: FS
authors.lastname: Jørgensen
mesh_terms: D000328:Adult; D003718:Denmark; D005260:Female; D006801:Humans; D011247:Pregnancy; D016216:Ultrasonography, Prenatal / Q000706:statistics & numerical data*