Postpartum Contraceptive Use, Pregnancy Intentions in Women With and Without a Delivery of a NAS-Affected Infant in Delaware, 2012-2018.

Objective: Assess differences in postpartum contraceptive use and pregnancy intentions in women with a recent live birth who delivered a neonatal abstinence syndrome (NAS) affected infant.

Study design: Using linked Delaware Birth Certificate Data, Hospital Discharge Data and PRAMS data for 2012-2018 (n = 6,358 singleton births), we assessed differences among women with and without a delivery of an NAS-affected infant by effective postpartum contraceptive use and pregnancy intentions. We calculated prevalence estimates, crude (cPOR), and prevalence odds ratios adjusted (aPOR) for NAS by maternal characteristics. We used alpha ≤ 0.05 to determine statistical significance.

Results: Prevalence of NAS was 2.2% (95% CI: 1.8 - 2.6). Effective postpartum contraceptive use was 60.4% (95% CI: 51.9-69.0) among women with delivery of an NAS-affected infant compared with a non-NAS delivery 56.4% (95% CI: 55.1-57.8%) and cPOR was 1.2 (95% CI: 0.8-1.7). Prevalence of intended pregnancy was 26.5% (95% CI: 18.9-34.0) among women with delivery of an NAS-affected infant compared with a non-NAS delivery 53.0% (95% CI: 51.7-54.4) and cPOR was 0.3 (95% CI: 0.2-0.5). After adjustment, women who delivered an NAS-affected infant had lower odds (aPOR = 0.5; 95% CI: 0.3-0.8) of indicating that their pregnancy was intended as compared to those who did not deliver an NAS-affected infant.

Conclusions: Our study found no association between delivery of an NAS-affected infant and use of an effective postpartum contraceptive method. However, we found that pregnancy intendedness was lower among women delivering an NAS-affected infant compared with women without an NAS delivery even after accounting for maternal characteristics.