Related Experiment Videos
Recurrence of prolonged pregnancy
I Mogren1, H Stenlund, U Högberg
1Department of Obstetrics and Gynecology, Umeå University, Sweden.
International Journal of Epidemiology
|May 26, 1999
Summary
Maternal history of prolonged pregnancy slightly increases daughter's risk. A prior prolonged pregnancy significantly raises the risk for future births, though familial factors explain only a small portion of cases.
Area of Science:
- Reproductive Health
- Perinatal Epidemiology
- Genetics in Obstetrics
Background:
- Investigating familial and historical risk factors for prolonged pregnancy.
- Assessing intergenerational and intragenerational recurrence risks.
Purpose of the Study:
- To determine if maternal prolonged pregnancy is a risk factor for daughter's prolonged pregnancy.
- To evaluate if a previous prolonged pregnancy predicts subsequent prolonged pregnancies.
Main Methods:
- Cohort study utilizing Swedish Medical Birth Registry data (1955-1990).
- Analysis of mother-daughter pairs and subsequent pregnancies.
- Calculation of relative risk (RR) and 95% confidence intervals (CI).
Main Results:
- Maternal history of prolonged pregnancy showed a moderate risk increase (RR=1.3) for daughters.
- Previous prolonged pregnancy increased subsequent risk 2-3 fold (RR=2-3).
- Confounders like parity and maternal age did not significantly alter these risks.
Conclusions:
- Maternal prolonged pregnancy is a moderate risk factor for offspring.
- A history of prolonged pregnancy is a significant predictor for subsequent births.
- Familial predisposition accounts for a minor proportion of overall prolonged pregnancy occurrences.