The incidence of premature births.
D000925:Anticoagulants; D005260:Female; D006493:Heparin / Q000628:therapy*; D006801:Humans; D015994:Incidence; D007752:Obstetric Labor, Premature; D011247:Pregnancy; D047928:Premature Birth
D000925:Anticoagulants; D006493:Heparin
HEPARIN/therapy; LABOR/premature