title: Planned elective repeat caesarean section versus planned vaginal birth for women with a previous caesarean birth.
abstract: BACKGROUND
  When a woman has had a previous caesarean birth, there are two options for her care in a subsequent pregnancy: planned elective repeat caesarean or planned vaginal birth. While there are risks and benefits for both planned elective repeat caesarean birth and planned vaginal birth after caesarean, current sources of information are limited to non-randomised cohort studies. Studies designed in this way have significant potential for bias and consequently conclusions based on these results are limited in their reliability and should be interpreted with caution.
  
  
  OBJECTIVE
  To assess, using the best available evidence, the benefits and harms of a policy of planned elective repeat caesarean section with a policy of planned vaginal birth after caesarean section for women with a previous caesarean birth.
  
  
  METHODS
  We searched the Cochrane Pregnancy and Childbirth Group trials register (24 June 2004), the Cochrane Central Register of Controlled Trials (The Cochrane Library, Issue 1, 2004), and PubMed (1966 to 24 June 2004).
  
  
  METHODS
  Randomised controlled trials with reported data that compared outcomes in mothers and babies who planned a repeat elective caesarean section with outcomes in women who planned a vaginal birth, where a previous birth had been by caesarean.
  
  
  METHODS
  Two reviewers independently assessed trial quality and extracted data.
  
  
  RESULTS
  There were no randomised controlled trials identified.
  
  
  CONCLUSIONS
  Planned elective repeat caesarean section and planned vaginal birth after caesarean section for women with a prior caesarean birth are both associated with benefits and harms. Evidence for these care practices is drawn from non-randomised studies, associated with potential bias. Any results and conclusions must therefore be interpreted with caution. Randomised controlled trials are required to provide the most reliable evidence regarding the benefits and harms of both planned elective repeat caesarean section and planned vaginal birth for women with a previous caesarean birth.
authors.affiliation: Department of Obstetrics and Gynaecology, University of Adelaide, Women's and Children's Hospital, 72 King William Road, Adelaide, South Australia, Australia, 5006. jodie.dodd@adelaide.edu.au
authors.forename: J M
authors.initials: JM
authors.lastname: Dodd
authors.forename: C A
authors.initials: CA
authors.lastname: Crowther
authors.forename: E
authors.initials: E
authors.lastname: Huertas
authors.forename: J M
authors.initials: JM
authors.lastname: Guise
authors.forename: D
authors.initials: D
authors.lastname: Horey
mesh_terms: D017604:Cesarean Section, Repeat; D017558:Elective Surgical Procedures; D005260:Female; D006801:Humans; D015201:Meta-Analysis as Topic; D011247:Pregnancy; D016064:Vaginal Birth after Cesarean