Study Suggests: Prolonging Pregnancy in Twins After PPROM with Tocolysis—A Double-Edged Sword?

The Challenge of Twin Pregnancies and Early Water Breaking

Preterm premature rupture of membranes (PPROM)—when the water breaks too early—can be especially daunting in twins, where risks of early delivery and complications are already elevated. Can maintenance tocolysis (medications to suppress contractions and delay labor) safely prolong pregnancy and improve outcomes in this high-risk group? A large retrospective study from Wuhan, China, sought to answer this question.

What Did the Study Do?

Researchers analyzed 264 twin pregnancies with PPROM between 24 and 34 weeks’ gestation, comparing those who received maintenance tocolysis (more than 48 hours of uterine contraction suppression) to those who did not (or had only short-term tocolysis). They examined how long pregnancies were prolonged, the babies’ gestational ages at birth, and a range of neonatal outcomes.

Key Findings: More Time In Utero—With a Catch

Longer Pregnancies: Maintenance tocolysis significantly extended the time from membrane rupture to delivery (median 10.4 days vs. 0.6 days in controls), raising the gestational age at birth.

Better Someways for Babies: This extra time in the womb was linked to lower risks of neonatal intensive care unit (NICU) admission, neonatal death, respiratory distress syndrome (RDS), and patent ductus arteriosus (PDA—a heart issue), especially for those with earlier PPROM.

No Significant Increase in Infection: There was no statistically significant increase in chorioamnionitis (intrauterine infection) or neonatal sepsis, provided careful monitoring and strict selection for tocolysis.

But Watch for Hypoglycemia and Growth: Babies exposed to longer tocolysis had higher rates of neonatal hypoglycemia (low blood sugar, likely related to the combined use of tocolytics and antenatal steroids) and, in late PPROM, lower birthweight percentiles—suggesting a possible impact on fetal growth.

Balancing Risks and Benefits

While the study shows that maintenance tocolysis can buy valuable time for fetal development and reduce certain complications, it also highlights real risks—chiefly, issues with blood sugar and growth. The authors urge individualized care: maintenance tocolysis may be most beneficial for those with early PPROM and without signs of infection or fetal distress. Meticulous monitoring for infection and neonatal glucose problems is essential.

Key Takeaways

Maintenance tocolysis after PPROM in twins can prolong pregnancy by over a week, improving some neonatal outcomes.

Benefits include fewer NICU admissions, deaths, and certain complications like PDA and RDS.

No notable rise in infection rates if protocols and monitoring are rigorous.

There is a higher risk of neonatal hypoglycemia and, in some cases, reduced fetal growth.

Careful patient selection and close monitoring are crucial for optimizing outcomes and minimizing harm.

Citation:

Praseth L, Lv D, Chen S, et al. Maintenance tocolysis in twin pregnancies after preterm premature rupture of membranes and neonatal outcomes: a retrospective cohort study. BMC Pregnancy and Childbirth. 2026. https://doi.org/10.1186/s12884-026-09144-8