Prenatal risk indicators of a prolonged pregnancy: The Danish Birth Cohort 1998-2001

Annette Wind Olesen, Jes Grabow Westergaard, Jørn Olsen

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

BACKGROUND: Few prenatal risk factors of prolonged pregnancy, a pregnancy of 42 weeks or more, are known. The objective was to examine whether sociodemographic, reproductive, toxicologic, or medical health conditions were associated with the risk of prolonged pregnancy.

METHODS: Data from the Danish Birth Cohort in Denmark were used. Interview data from 53,392 participants with live-born singleton deliveries in the period 1998-2001 were available at the time of this study. The participants were interviewed by telephone at 12 and 30 weeks' gestation, and 6 and 18 months after delivery. Statistical analyses were done using logistic regression.

RESULTS: Women with a pre-pregnancy body mass index of 25 kg/m2 or more had a high risk of prolonged pregnancy. If the pre-pregnancy body mass index was 35 kg/m2 or more the odds ratio was 1.52 (95% CI 1.28-1.82). Nulliparity also increased the risk of prolonged pregnancy (OR (95% CI) = 1.35 (1.27-1.44)).

CONCLUSIONS: The risk of post-term delivery was high in women with a pre-pregnancy body mass index of 25 kg/m2 or more, and in nulliparous women.

Original languageEnglish
JournalActa Obstetricia et Gynecologica Scandinavica
Volume85
Issue number11
Pages (from-to)1338-1341
ISSN0001-6349
DOIs
Publication statusPublished - 2006

Keywords

  • Adolescent
  • Adult
  • Body Mass Index
  • Denmark
  • Female
  • Humans
  • Parity
  • Pregnancy
  • Pregnancy, Prolonged
  • Risk Factors

Fingerprint Dive into the research topics of 'Prenatal risk indicators of a prolonged pregnancy: The Danish Birth Cohort 1998-2001'. Together they form a unique fingerprint.

Cite this