Preterm Labor

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Topic pages summarize public health information in plain language. They may describe common causes and treatments in general terms; your own plan of care depends on your clinician’s exam, history, and tests. Use what you read here to prepare questions—not to start, stop, or change medications or to self-diagnose.

Preterm labor is labor that starts before 37 completed weeks of pregnancy. It can lead to premature birth. Premature babies may face serious health risks.

Symptoms of preterm labor include:

  • Contractions every 10 minutes or more often
  • Leaking fluid or bleeding from the vagina
  • Feeling of pressure in the pelvis
  • Low, dull backache
  • Cramps that feel like menstrual cramps
  • Abdominal cramps with or without diarrhea

If you think you might be having preterm labor, contact your health care provider.

NIH: National Institute of Child Health and Human Development