Preterm labor refers to regular uterine contractions resulting in changes to the cervix that begin before 37 weeks of pregnancy. If not stopped through medical intervention, it leads to premature birth with its associated risks. Risk factors for preterm labor include infection, multiple pregnancies (twins or triplets), and chronic health conditions, and women experiencing signs of preterm labor require immediate medical evaluation to determine if interventions can safely delay delivery.
Michael S. Porter
Eric C. Nordby