Antibiotic administration after previable preterm prelabor rupture of membranes is associated with prolonged latency.

Introduction: While antibiotics have been shown to increase the interval to delivery between rupture of membranes and delivery (latency) and improve neonatal outcomes after viable preterm prelabor rupture of membranes (PPROM), this has not been well investigated in the previable PPROM population. We aimed to investigate the association between antenatal antibiotics and latency following previable PPROM. Secondarily, we examined various maternal and neonatal outcomes. We hypothesized that the administration of antibiotics would prolong latency in pregnancies with previable PPROM. Methods: Single-center retrospective cohort study that included pregnancies diagnosed with previable PPROM between 14 Results: After controlling for estimated gestational age at rupture of membranes, receipt of antibiotics after previable PPROM was associated with a 14.7-day increase in latency (SE = 6.86, Conclusion: Receipt of latency antibiotics after previable PPROM was associated with prolonged latency in both singleton and multiple gestation pregnancies. Those exposed to antibiotics had more deliveries at or beyond 22 0/7 weeks, higher neonatal survival-to-discharge rates, and fewer IUFDs. These findings highlight the potential benefit of latency antibiotics in extending pregnancy duration and improving neonatal outcomes following previable PPROM, supporting their consideration in expectant management and the necessity for larger prospective studies.