Babies do better after a scheduled Caesarean section if they’re born no sooner than seven days before their due date, a new large study of U.S. births shows. Those delivered earlier had more complications, including breathing problems, even though they were full term, the researchers reported in Thursday’s New England Journal of Medicine. Even just a few days made a difference, they said.
The findings offer important guidance to the growing number of women who face planned C-sections. And the study supports recommendations that elective C-sections be scheduled after 39 weeks unless tests show the infant’s lungs are fully mature. Due dates are set at 40 weeks gestation and infants are full term at 37 weeks.
In this study, the researchers focused on 13,258 women who had a single child at a planned Caesarean and who had previously given birth the same way. More than a third of the C-sections were performed before 39 weeks, the researchers found. Those delivered at 37 weeks were twice as likely to have health problems, including breathing troubles, infections, low blood sugar or the need for intensive care. Fifteen percent of those born at 37 weeks and 11 percent born at 38 weeks had complications, compared to 8 percent of the babies delivered at 39 weeks. The only death was an infant born at 39 weeks.
The biggest difference was in breathing problems, with a fourfold increase for those born at 37 weeks compared to 39 weeks. Babies born by C-section already have a higher risk of breathing trouble than those born vaginally; labor helps clear the lungs of fluid.
Source: Huffington Post, 7 January 2009
Chapter: Pregnancy :: 12 February 2009
