One of the most common and well-documented risk factors forpreterm labor isa history of assistive…

➤ How does assisted reproductive technology (ART) affect the risk of preterm delivery?
ART raises preterm risk mainly through higher rates of multiple gestation and abnormal placentation. Singleton ART pregnancies still have a modestly increased risk due to older maternal age and underlying infertility. Single embryo transfer and careful embryo selection reduce multiple pregnancies and therefore lower the overall preterm risk.