title: Cornual contraction ring with retained placenta in midtrimester abortion.
mesh_terms: D000028:Abortion, Induced / Q000009:adverse effects*; D000293:Adolescent; D002648:Child; D005260:Female; D006801:Humans; D010920:Placenta / Q000601:surgery; D011247:Pregnancy; D011262:Pregnancy Trimester, Second; D014599:Uterus / Q000002:abnormalities / Q000601:surgery