Does previous cesarean section influence neonatal birth weight? A path analysis in China.

Area of Science:

• Obstetrics and Gynecology
• Perinatal Medicine
• Public Health Policy

Background:

• China's Two-child policy revision in 2013 led to a rise in pregnancies with prior cesarean sections.
• Investigating the impact of previous cesarean section on neonatal birth weight is critical in this context.

Purpose of the Study:

• To determine if a previous cesarean section influences neonatal birth weight in the Chinese population.
• To analyze the mediating pathways between prior cesarean section and birth outcomes.

Main Methods:

• Retrospective study of 3466 second pregnancies.
• Path analysis to model associations between previous cesarean section, placenta previa, gestational age, and birth weight.
• Model fit evaluated using CFI, RMSEA, and WRMR.

Main Results:

• A modified path model demonstrated significant associations.
• Direct effects of previous cesarean section on birth weight were positive (0.056), while indirect effects were negative (-0.127).
• Negative impacts were suppressed by other factors, indicating a complex relationship.

Conclusions:

• Previous cesarean section is linked to adverse neonatal birth weight outcomes, partly due to increased placenta previa and preterm birth.
• Positive factors, such as maternal body mass index, can mitigate these negative effects.
• Findings highlight the nuanced impact of prior cesarean sections on birth weight post-policy changes.