What is a significant risk factor for preterm labor?

A significant risk factor for preterm labor is a history of previous preterm births. This is because women who have previously experienced preterm labor are more likely to undergo it again in subsequent pregnancies. Several factors contribute to this increased risk, including alterations in the uterus and cervix that may make preterm labor more likely to occur.

While other options, such as high blood pressure, multiple pregnancies, and older maternal age, can also contribute to the risk of preterm labor, the strongest individual predictor is often the history of previous preterm births. This highlights the importance of careful monitoring and management of pregnant women with this background to optimize outcomes for both the mother and the baby.