[Perinatal mortality after previous cesarean section].

Area of Science:

• Obstetrics and Gynecology
• Perinatal Medicine
• Neonatal Health

Background:

• Maternal history of cesarean delivery is associated with increased perinatal neonatal mortality.
• The risk is elevated compared to deliveries following a previous vaginal birth.
• Understanding the causes of these deaths is crucial for improving outcomes.

Purpose of the Study:

• To analyze the specific causes of perinatal deaths in deliveries following a previous cesarean section.
• To identify factors contributing to increased mortality in this patient group.
• To inform clinical practice regarding delivery management after cesarean.

Main Methods:

• Retrospective analysis of a large database from the Swiss Working Group of Obstetric and Gynecological Institutions.
• Inclusion of 29,046 deliveries with a history of previous cesarean section between 1983 and 1996.
• Detailed examination of 130 recorded perinatal neonatal deaths.

Main Results:

• In term deliveries, causes included malformations (20), uterine rupture (5), placental abruption (5), and respiratory distress syndrome (5).
• In preterm deliveries, causes were prematurity (38), malformations (12), chorioamnionitis (12), placental abruption (9), and severe growth retardation (4).
• Preterm births are more frequent after prior cesarean, linked to placental abruption, chorioamnionitis, and growth retardation.

Conclusions:

• Preterm delivery is more common after cesarean, driven by placental and growth issues, not labor onset.
• While some deaths relate to prior cesarean, perinatal death remains rare.
• Routine repeat cesarean delivery is not supported; trial of labor remains a viable option.