Changes in plasma oestradiol-17beta, progesterone, testosterone, LH and fertility after treatment with I.C.I. 80, 996.
Fifty heifers were twice injected with I.C.I. 80, 996 and inseminated 72 h and 96 h after the second administration. Twenty eight of them (56%) became pregnant. Changes in plasma oestradiol-17 beta, progesterone and LH concentrations around the oestrus following the second injection were similar to those occurring in spontaneous oestrus. The pattern of testosterone secretion resembled that of oestradiol;-17 beta. The highest testosterone concentration (135 +/- 24 pg/ml) was measured on the third day after treatment with I.C.I. 80, 996.
D000818:Animals; D002417:Cattle; D003008:Cloprostenol / Q000494:pharmacology*; D004958:Estradiol / Q000097:blood*; D004971:Estrus; D005260:Female; D005298:Fertility / Q000187:drug effects*; D007700:Kinetics; D007986:Luteinizing Hormone / Q000097:blood*; D011247:Pregnancy; D011374:Progesterone / Q000097:blood*; D011461:Prostaglandins F, Synthetic / Q000494:pharmacology*; D013739:Testosterone / Q000097:blood*
D011461:Prostaglandins F, Synthetic; D013739:Testosterone; D003008:Cloprostenol; D011374:Progesterone; D004958:Estradiol; D007986:Luteinizing Hormone