Obstetric characteristics among nulliparas under age 15.

OBJECTIVE

To describe and analyze the obstetric characteristics of adolescent women under 15 years of age.

METHODS

A matched cohort design was used. The pregnancies of 261 nulliparous women under age 15 delivered at our institution between January 1990 and December 1992 were compared to 261 nulliparous controls aged 20-29, matched for race, infant gender, and year of delivery. Multiple gestation and delivery immediately after hospital admission were exclusion criteria.

RESULTS

The number of antepartum admissions was identical (n = 35 in each group). There were no significant differences between the study and control groups in cervical dilatation at admission, frequency of labor induction (12.6% for each), epidural anesthesia (44.4 versus 49.4%), mean birth weight (2918 +/- 661 versus 2979 +/- 753 g), or preterm birth (24.1 versus 20.3%). Use of oxytocin was less common and magnesium sulfate more common in the adolescent group. Nevertheless, the duration of the active phase of labor and the rate of cesarean delivery were significantly lower in the adolescent group (4.5 +/- 2.7 versus 5.2 +/- 2.4 hours, P = .02; and 13.8 versus 25.3%, P = .001, respectively). The incidence of operative vaginal delivery was not different between the groups. Analysis of the data after controlling for fetal presentation, marital status, and insurance status did not alter these findings. Postpartum complications were similar.

CONCLUSION

Pregnancy at the lower limit of reproductive age in an urban American population is not associated with an abnormal labor course, as is commonly believed.