Postpartum Contraceptive Use Among Denver-Based Adolescents and Young Adults: Association with Subsequent Repeat Delivery.

STUDY OBJECTIVE

To determine the association of postpartum contraceptive use with repeat deliveries among adolescents and youth.

DESIGN

Retrospective, observational analysis of electronic health record data.

SETTING

Single, urban facility in Denver, Colorado, United States.

PARTICIPANTS

Women aged 10-24 years who gave birth between January 1, 2011 and December 31, 2015.

INTERVENTIONS AND MAIN OUTCOME MEASURES

Postpartum contraceptive use and time to subsequent delivery.

RESULTS

Among 4068 women, 1735 (43%) used postpartum contraception. In adjusted analyses, characteristics associated with contraceptive use included Hispanic ethnicity (relative risk [RR], 1.1; P = .03), incremental prenatal visits (RR, 1.01; P = .047), and attendance at postpartum care (RR, 1.60; P < .001). Long-acting reversible contraceptive (LARC) use was higher among women younger than 15 years (reference: 20-24 years; RR, 1.12; P < .001) and lower among women aged 18-19 years (RR, 0.93; P = .009). Hispanic women had higher rates of LARC use than non-Hispanic women (RR, 1.07; P = .02). Compared with inpatient LARC placement, outpatient placement (1-4 weeks and 5 or more weeks) rates were lower (RR, 0.77 and RR, 0.89, respectively; P < .001). Time to subsequent delivery was shorter in non-LARC users (median, 659 days) and contraception nonusers (median, 624 days) compared with LARC users (median, 790 days; P < .001); non-LARC postpartum contraceptive use did not significantly alter time to repeat delivery compared with that in women who used no method (P = .24).

CONCLUSION

Postpartum LARC use reduced the risk of repeat pregnancy with a significant increase in time to the next delivery. Non-LARC use was not different from no contraceptive use in terms of time to repeat delivery.