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 language | English |
|---|---|
| Journal | Acta Obstetricia et Gynecologica Scandinavica |
| Volume | 85 |
| Issue number | 11 |
| Pages (from-to) | 1338-1341 |
| ISSN | 0001-6349 |
| DOIs | |
| Publication status | Published - 2006 |
Keywords
- Adolescent
- Adult
- Body Mass Index
- Denmark
- Female
- Humans
- Parity
- Pregnancy
- Pregnancy, Prolonged
- Risk Factors