title: Onset of diestrus in the Beagle bitch: definition and significance.
mesh_terms: D000818:Animals; D000831:Animals, Newborn; D001947:Breeding; D002452:Cell Count; D003338:Corpus Luteum / Q000033:anatomy & histology; D004285:Dogs / Q000502:physiology*; D004847:Epithelial Cells; D004971:Estrus; D005260:Female; D005298:Fertility; D005306:Fertilization; D007962:Leukocytes / Q000166:cytology; D008297:Male; D011247:Pregnancy; D013997:Time Factors; D014626:Vaginal Smears