Obstetric Labor, Premature

**Definition:** Onset of OBSTETRIC LABOR before term (TERM BIRTH) but usually after the FETUS has become viable. In humans, it occurs sometime during the 29th through 38th week of PREGNANCY. TOCOLYSIS inhibits premature labor and can prevent the BIRTH of premature infants (INFANT, PREMATURE).

**Tree numbers:** - C12.050.703.420.491

**Synonyms:** - Labor, Premature - Premature Labor - Premature Obstetric Labor - Preterm Labor