Berghella, Vincenzo

Preterm Labor 1. What every clinician should know Clinical features and incidence Preterm labor (PTL) is often defined as uterine contractions (four or more/20 minutes or eight or more/hour) and documented cervical change with intact membranes at 20-36 6/7 weeks. In addition to cervical change, many (including us) would consider as additional evidence of preterm…