Preterm labor.
D000328:Adult; D001724:Birth Weight; D002584:Cervix Uteri / Q000502:physiology; D005260:Female; D005313:Fetal Death; D005333:Fetus; D006801:Humans; D007231:Infant, Newborn; D008423:Maternal Age; D009119:Muscle Contraction; D007752:Obstetric Labor, Premature; D010298:Parity; D011247:Pregnancy; D013997:Time Factors