A study of risks to mothers and infants suggests that the optimal delivery time is 37 weeks for women who have had three or more cesarean sections and 38 weeks for those with two previous C-section deliveries. The findings were presented at the annual meeting of the Society for Maternal-Fetal Medicine. Researchers analyzed data from a cesarean section registry that includes nearly 6,500 women, and found that repeat cesarean delivery at 39 weeks was linked to greater maternal risks. "There's a linear increase in maternal risk starting at 37 weeks," presenter Dr. Laura Hart said.

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