Progestin content  of ovaries and the effect on assessment of luteal activity i the bovine.
D000818:Animals; D002417:Cattle / Q000502:physiology*; D003338:Corpus Luteum / Q000032:analysis*; D005260:Female; D010053:Ovary / Q000032:analysis*; D011374:Progesterone / Q000097:blood*
D011374:Progesterone