Labor induction in indicated moderate to late preterm birth

Area of Science:

• Obstetrics and Gynecology
• Maternal-Fetal Medicine
• Neonatalogy

Background:

• Preterm birth, occurring between 32 and 37 weeks gestation, necessitates medical intervention.
• Indications for preterm birth include premature rupture of membranes, preeclampsia, intrauterine growth restriction, fetomaternal alloimmunization, and intrahepatic cholestasis.
• Evaluating the efficacy of labor induction in these cases is crucial for optimizing maternal and neonatal outcomes.

Purpose of the Study:

• To assess the success rate of labor induction for indicated moderate and late preterm births.
• To evaluate the mode of delivery following labor induction in preterm pregnancies.
• To compare the success of labor induction and vaginal delivery rates between moderate and late preterm births.

Main Methods:

• An observational study was conducted in a tertiary care unit from 2013 to 2015.
• Included were patients undergoing labor induction for indicated preterm birth (32⁺⁰ to 36⁺⁶ weeks gestation).
• Labor induction success was defined as repeated uterine contractions with cervical dilation >3 cm; mode of delivery and neonatal outcomes were secondary endpoints.

Main Results:

• Of 824 births, 105 (12.7%) involved labor induction for preterm birth.
• Labor induction was successful in 90.5% of cases, with 72.4% achieving vaginal delivery.
• Success rates did not significantly differ between moderate and late preterm births (87.5% vs. 90.7%), but vaginal delivery rates were significantly lower in moderate preterm births (37.5% vs. 75.3%).

Conclusions:

• Labor induction demonstrates high success rates and contributes to significant rates of vaginal delivery in both moderate and late preterm births.
• Labor induction is a viable and effective management strategy for indicated preterm births.
• Consideration of labor induction should be standard practice for medical indications in preterm pregnancies.