Should intravenous tocolysis be considered beyond 34 weeks' gestation?

Area of Science:

• Neonatal Medicine
• Perinatology
• Public Health

Background:

• Preterm birth remains a significant concern in neonatal care.
• Respiratory distress syndrome (RDS) is a common complication in preterm infants.
• Understanding RDS incidence across different late preterm gestations is crucial for clinical management.

Purpose of the Study:

• To determine the incidence of respiratory distress syndrome (RDS) in nonindigent women experiencing uncomplicated preterm labor.
• To specifically analyze RDS rates in infants delivered between 34 and 36 weeks' gestation.

Main Methods:

• Retrospective analysis of women with uncomplicated preterm labor and intact membranes delivering between 34 and 36 weeks' gestation.
• Calculation of RDS rates post-delivery for each gestational week.
• Statistical analysis using chi-squared test to assess significance (P <.05).

Main Results:

• The incidence of RDS was 17.4% at 34 weeks (8/46 infants).
• RDS incidence decreased to 6.3% at 35 weeks (5/80 infants) and 4.2% at 36 weeks (7/165 infants).
• A statistically significant difference in RDS rates was observed between 34 and 35 weeks (P =.048) and overall across the gestations (P =.008).

Conclusions:

• The incidence of respiratory distress syndrome is significantly higher in infants delivered at 34 weeks' gestation compared to 35 or 36 weeks.
• These findings underscore the increased vulnerability of infants born at 34 weeks to RDS.
• This data can inform clinical decision-making and resource allocation for late preterm infants.