Post-Term Pregnancy

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

Post-term pregnancy is one that progresses to 42 weeks' gestation. A key in making the proper diagnosis of post-term pregnancy is accurate pregnancy dating, best done with confirmational first-trimester ultrasound. The epidemiology is the opposite to preterm birth, with higher rates in obese women and those of white race/ethnicity. Such prolonged pregnancy is also seen more commonly with fetal complications such as anencephaly and placental sulphatase deficiency, pointing towards a fetal contribution to the initiation of labour. Complications of post-term pregnancy include higher rates of stillbirth, Caesarean delivery, meconium-stained amniotic fluid, neonatal acidaemia and neonatal death. One advantage of post-term pregnancy is that it is easily preventable with induction of labour. However, the timing of such induction during the term period is costly and understudied.

Original languageEnglish (US)
Title of host publicationDewhurst's Textbook of Obstetrics & Gynaecology: Eighth Edition
PublisherWiley-Blackwell
Pages269-286
Number of pages18
ISBN (Print)0470654570, 9780470654576
DOIs
StatePublished - Jan 5 2012

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Keywords

  • Antenatal testing
  • Induction of labour
  • Neonatal acidaemia
  • Neonatal death
  • Post dates pregnancy
  • Post-term pregnancy
  • Prolonged pregnancy
  • Stillbirth

ASJC Scopus subject areas

  • Medicine(all)

Cite this

Caughey, A. B. (2012). Post-Term Pregnancy. In Dewhurst's Textbook of Obstetrics & Gynaecology: Eighth Edition (pp. 269-286). Wiley-Blackwell. https://doi.org/10.1002/9781119979449.ch23