Concentrations of LH, oestradiol-17 beta and progesterone in the peripheral plasma of swamp buffalo cows (Bubalus bubalis) around the time of oestrus.
Peripheral plasma concentrations of LH, oestradiol-17 beta and progesterone were measured in 13 mature swamp buffalo cows at 4-h intervals from 36-40 h before until 36-40 h after the onset of oestrus. Mean LH concentrations increased sharply to a peak of 35 ng/ml and returned to basal levels of 5 ng/ml within a 12-h period beginning soon after the onset of oestrus. Mean oestradiol-17 beta concentrations were within the range 9-13 pg/ml from 36-40 h before until 12-16 h after the onset of oestrus, and within the range 7-9 pg/ml thereafter. Progesterone concentrations remained around 0.1 ng/ml throughout the sampling period. There were no significant differences in hormone concentrations or changes between cows that conceived and those that did not conceive to artificial insemination 12-24 h after onset of oestrus.
D000818:Animals; D002020:Buffaloes / Q000097:blood*; D004958:Estradiol / Q000097:blood; D004971:Estrus; D005260:Female; D012739:Gonadal Steroid Hormones / Q000097:blood*; D007315:Insemination, Artificial / Q000662:veterinary; D007986:Luteinizing Hormone / Q000097:blood*; D011247:Pregnancy; D011374:Progesterone / Q000097:blood
D012739:Gonadal Steroid Hormones; D011374:Progesterone; D004958:Estradiol; D007986:Luteinizing Hormone