Incompetent os of the cervix as a cause of fetal loss.
D000028:Abortion, Induced / Q000209:etiology*; D000022:Abortion, Spontaneous; D002584:Cervix Uteri; D004194:Disease; D005260:Female; D006801:Humans; D011247:Pregnancy; D011248:Pregnancy Complications; D002577:Uterine Cervical Diseases
ABORTION/etiology; CERVIX UTERI/diseases; PREGNANCY/complications