There are several risk factors for preterm labor and premature birth, including ones that researchers have not yet identified. Some of these risk factors are “modifiable,” meaning they can be changed to help reduce the risk. Other factors cannot be changed.
Health care providers consider the following factors to put women at high risk for preterm labor or birth:
Certain medical conditions, including some that occur only during pregnancy, also place a woman at higher risk for preterm labor and delivery. Some of these conditions include3:
Other factors that may increase risk for preterm labor and premature birth include:
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