Abstract

Introduction: Women with HIV (WHIV) have higher risks of adverse pregnancy outcomes, particularly in the absence of antiretroviral treatment (ART), and timing of ART may impact risk. Methods: In the International Maternal Pediatric Adolescent AIDS Clinical Trials 2010/VESTED study, 643 pregnant WHIV in 9 countries were randomized in a 1:1:1 ratio to initiate ART: dolutegravir (DTG)+emtricitabine (FTC)/tenofovir alafenamide (TAF), DTG+FTC/tenofovir disoproxil fumarate (TDF), or efavirenz (EFV)/FTC/TDF. We describe adverse pregnancy outcomes in women with a subsequent pregnancy during 50 weeks of postpartum follow-up: spontaneous abortion (<20 weeks), stillbirth (≥20 weeks), preterm delivery (<37 weeks), and small for gestational age. Results: Of 643 women, 19 (3%) had 20 subsequent pregnancies while receiving ART at conception: DTG/FTC/TAF (3), DTG/FTC/TDF (2), EFV/FTC or lamivudine (3TC)/TDF (12), EFV/abacavir/3 TC (1), and no ART (1). Four spontaneous abortions, 3 stillbirths, and 1 induced abortion occurred. Three (25%) of 12 liveborn infants were preterm (24, 26, and 36 weeks of gestation). Only 12 subsequent pregnancies (60%) resulted in live birth, and at least 1 adverse pregnancy outcome occurred in 11 of 19 (58%) (induced abortion excluded). Of 7 women who experienced spontaneous abortion/stillbirth in the subsequent pregnancy, 4 experienced a stillbirth and 1 a neonatal death as outcomes of their earlier index pregnancy. No congenital anomalies were reported. Conclusions: Adverse pregnancy outcomes were common in this cohort of WHIV who conceived on ART shortly after an index pregnancy, 35% ended in stillbirth or spontaneous abortion. The majority of fetal losses occurred in women with recent prior pregnancy loss. Data from larger cohorts of WHIV conceiving on ART and surveillance are needed to elucidate rates and predictors of adverse pregnancy outcome.

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