Milk progesterone levels in cows with normal or prolonged estrous cycles, referenced to an early pregnancy diagnosis.
D000818:Animals; D002417:Cattle; D004971:Estrus; D005260:Female; D008892:Milk / Q000032:analysis*; D011247:Pregnancy; D011258:Pregnancy Tests / Q000662:veterinary*; D011374:Progesterone / Q000032:analysis*
D011374:Progesterone