The functions of the isthmus uteri, the formation of the lower uterine segment with a note on the so-called internal os of the cervix.
D002584:Cervix Uteri; D005260:Female; D006801:Humans; D011247:Pregnancy / Q000502:physiology; D014599:Uterus / Q000502:physiology*
PREGNANCY/physiology; UTERUS/physiology