title: Diagnosis of pregnancy and of the number of foetuses in sheep from plasma progesterone concentrations.
mesh_terms: D000818:Animals; D005260:Female; D011247:Pregnancy; D011258:Pregnancy Tests / Q000662:veterinary*; D011272:Pregnancy, Multiple; D011374:Progesterone / Q000097:blood*; D012756:Sheep / Q000502:physiology*; D013223:Statistics as Topic; D013997:Time Factors; D014463:Ultrasonography
chemical_list: D011374:Progesterone