Maternal Morbidity following Periviable Prelabor Rupture of Membranes after Texas Senate Bill 8

Standard practice prior to Texas Senate Bill 8 (SB 8) for those with periviable prelabor rupture of membranes (PROM) without contraindications to expectant management was to offer termination of pregnancy or expectant management. After SB 8 went into effect, pregnancy termination was only offered for these patients after the development of chorioamnionitis or clinically significant maternal hemorrhage. The aim of this study was to compare maternal outcomes of periviable PROM before and after SB 8 in Houston, TX.

This retrospective cohort study compared outcomes of periviable PROM less than 22 weeks of gestational age before and after SB 8 at three tertiary care hospitals from January 1, 2018, to March 31, 2023. Our primary outcome was a composite of adverse maternal outcomes: Sepsis, transfusion, and intensive care unit (ICU) admission. Secondary outcomes included intraamniotic infection, postpartum hemorrhage, abruption, septic shock, hospital length of stay, time from rupture of membranes to delivery, and neonatal survival.

Over the 5-year study period, 161 women met the inclusion criteria (96 pre-SB 8 vs. 65 post-SB8). Approximately half (54%) of those with periviable PROM opted for termination prior to SB8. Post-SB8, women were more likely to develop an adverse outcome (22.9 vs. 35.4%; aRR = 1.69, 95% confidence interval [CI]: 1.03-2.78), and were more likely to develop sepsis (9.4 vs. 29.2%; adjusted relative risk [aRR] = 2.97, 95% CI: 1.43-6.17). Five neonates survived to hospital discharge post-SB8, and one survived prior to SB8. Additionally, those expectantly managed post-SB8, compared with those expectantly managed pre-SB8, experienced a longer time from rupture of membranes to delivery (6.5 days post [2-14] vs. 3 days pre [1-7.5]), and a higher rate of sepsis (18 post [30.0%] vs. 6 pre [15.0%]).

These results provide evidence that periviable PROM alone is a life-threatening condition with a serious risk of maternal harm. Waiting for maternal infection or hemorrhage to develop before offering pregnancy termination increases the risks of serious maternal morbidity.

· Pre-SB8, 54% of women with periviable PROM chose termination.. · Increased rates of sepsis were observed post-SB8.. · Longer rupture of membranes to delivery times were observed post-SB8..