title: Utilization of frozen sections with the vaginal biopsy technique for early pregnancy diagnosis in swine.
mesh_terms: D000818:Animals; D001706:Biopsy; D004847:Epithelial Cells; D004971:Estrus; D005260:Female; D005615:Freezing; D008722:Methods; D011247:Pregnancy; D011258:Pregnancy Tests; D013552:Swine / Q000502:physiology*; D013997:Time Factors; D014621:Vagina / Q000166:cytology*