The valve-like action of the uterotubal function of the ewe.
D000818:Animals; D005187:Fallopian Tubes / Q000502:physiology*; D005260:Female; D006801:Humans; D012756:Sheep / Q000502:physiology; D034561:Sheep, Domestic; D014599:Uterus / Q000502:physiology*
FALLOPIAN TUBES/physiology; SHEEP/physiology; UTERUS/physiology