Unintended Pregnancy and Interpregnancy Interval by Maternal Age, National Survey of Family Growth
National Survey of Family Growth. Contraception
Birth spacing, Interpregnancy intervals, Postpartum contraception, Pregnancy intention
Background: The relationship between unintended pregnancy and interpregnancy interval (IPI) across maternal age is not clear. Methods: Using data from the National Survey of Family Growth, we estimated the percentages of pregnancies that were unintended among IPI groups (<6, 6-11, 12-17, 18-23, 24+ months) by maternal age at last live birth (15-19, 20-24, 25-29, 30-44 years). Results: Approximately 40% of pregnancies were unintended and 36% followed an IPI<18 months. Within each maternal age group, the percentage of pregnancies that were unintended decreased as IPI increased. Conclusion: Unintended pregnancies are associated with shorter IPI across the reproductive age spectrum.
Ahrens KA, Thoma ME, Copen CE, Frederiksen BN, Decker EJ, Moskosky S. Unintended Pregnancy and Interpregnancy Interval by Maternal Age, National Survey of Family Growth. Contraception, 2018 Jul;98(1):52-55.