title: Absence of hematometria in isthmic atresia.
mesh_terms: D002584:Cervix Uteri / Q000002:abnormalities; D005260:Female; D006409:Hematometra / Q000453:epidemiology*; D006801:Humans; D008598:Menstruation; D002577:Uterine Cervical Diseases / Q000151:congenital*