title: Studies on vaginal cytology during the canine oestrous cycle.
mesh_terms: D000818:Animals; D004285:Dogs / Q000033:anatomy & histology* / Q000502:physiology; D004971:Estrus; D005260:Female; D011247:Pregnancy; D013997:Time Factors; D014621:Vagina / Q000166:cytology*; D014626:Vaginal Smears / Q000662:veterinary