Article Text

Download PDFPDF
Review: previous caesarean delivery or abortion increases the risk of placenta praevia

Statistics from

Request Permissions

If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.

OpenUrlCrossRefPubMedWeb of Science

Question Does a history of caesarean deliveries, spontaneous abortions, or induced abortions increase the risk of placenta praevia?

Data sources

Studies were identified by searching Medline databases using the keywords placenta praevia, placental disorders, antepartum haemorrhage, antepartum bleeding, caesarean delivery, caesarean section, uterine surgery, spontaneous abortion, induced abortion, and elective abortion; and by scanning bibliographies of relevant papers.

Study selection

Studies were selected if they provided quantitative analysis of placenta praevia and were published in English between 1950 and 1996. Studies on placental abruption and case reports were excluded.

Data extraction

Data were extracted on the total number of pregnancies; the number of pregnancies complicated by placenta praevia; previous caesarean deliveries, spontaneous abortions, and induced abortions; study design; and the country in which the study was run. Odds ratios (ORs) were calculated using fixed and random effects models with results from random effects models considered to be more reliable due to evidence of heterogeneity …

View Full Text


  • Source of funding: no external funding.

  • For article reprint: Dr C V Ananth, The Center for Perinatal Health Initiatives, Department of Obstetrics, Gynecology and Reproductive Sciences, University of Medicine and Dentistry of New Jersey, Robert Wood Johnson Medical School, 125 Paterson Street, New Brunswick, NJ 08901–1977, USA. Fax +1 732 235 6627.