Thibier, M Oestradiol-17beta, progesterone and 17alpha-hydroxyprogesterone concentrations in jugular venous plasma in cows prior to and during oestrus. [electronic resource] - Journal of steroid biochemistry Oct 1975 - 1433-7 p. digital Publication Type: Journal Article ISSN: 0022-4731 Standard No.: 10.1016/0022-4731(75)90081-3 doi Subjects--Topical Terms: AnimalsCastrationCattleEstradiol--bloodEstrusFemaleHydroxyprogesterones--bloodLactationMalePregnancyProgesterone--blood