Studies increasingly are challenging long-held beliefs about Caesareans, such as that women who had one need to deliver future babies the same way.
Now doctors are looking hard at C-sections for twin births, which are on the rise because of infertility treatments. Twins have more risk for birth complications and some studies suggest C-sections lower that risk, but this had not been put to a rigorous test.
Dr. Jon Barrett of Sunnybrook Health Sciences Center in Toronto, led a study in 25 countries of 2,800 women pregnant with twins. All of the first of the twins to be delivered were in good position for birth (most doctors still recommend a C-section if the first twin is in feet-first or breech position).
Half of the moms were scheduled to have C-sections and the rest, vaginal births. About 40 percent of the latter group wound up having C-sections, and 10 percent of those scheduled to have Caesareans ended up giving birth vaginally.
About 2 percent of newborns died or had a serious problem, but the manner of birth made no difference. Nor did it affect the rate of complications in moms.
The Canadian Institutes of Health Research paid for the study. Results are in Thursday's New England Journal of Medicine.
Image: Twin babies, via Shutterstock