Cyclic variations in the endocervix.
D002584:Cervix Uteri / Q000502:physiology*; D005260:Female; D006801:Humans; D007743:Labor, Obstetric; D008598:Menstruation / Q000502:physiology*; D009119:Muscle Contraction; D011247:Pregnancy
CERVIX, UTERINE/physiology; MENSTRUATION/physiology