Neonatal respiratory morbidity in twins versus singletons after elective prelabor caesarean section

Objective: To compare the rate of neonatal respiratory morbidity in singletons versus twins delivered by pre-labour caesarean section. Study design: Uncomplicated pregnancies delivered by prelabor caesarean section at 34 + 0 to 37 + 6 weeks' gestation were retrospectively selected. For both singletons and twins caesarean delivery was undertaken electively only after amniocentesis and if the lecithin/sphingomyelin ratio was >= 2. Neonatal respiratory morbidity was compared in twins versus singletons. Results: 241 singletons and 100 twin neonates were included. Overall neonatal respiratory morbidity was comparable between the two groups (25/241 (11.7%) versus 7/100 (7%), p = .331). Between 34 + 0 and 36 + 6 weeks, however, the risk was higher among singleton than twins (15/46 (32.6%) versus 6/72 (8.3%), p < .001). At multiple regression, dichorionicity, gestational age at delivery >= 37 weeks and female sex independently decreased the risk of neonatal respiratory morbidity. Conclusion: The risk of neonatal respiratory morbidity after elective caesarean section seems lower among twins, especially prior to 37 + 0 weeks.