Oestradiol-17 beta in the milk of cows from 6 days before to 14 days after their insemination.
In artificially inseminated cows (AI on day 1) peak concentrations of oestradiol-17 beta in defatted milk occurred at median times of day 0 during the pre-ovulatory period, days -5 to 2, and day 6 during the post-ovulatory period, days 2-15. Median peak concentrations during these periods were approximately 5 pg/ml and 3 pg/ml respectively. There were no significant differences in the timing or magnitude of oestradiol-17 beta concentrations between cows that became pregnant to the AI and those that entered normal length oestrus cycles immediately after AI.
Gyawu
P
P
Centre for Dairy Research, University of Reading.
Pope
G S
GS
D000818:Animals; D002417:Cattle; D004958:Estradiol / Q000032:analysis*; D004971:Estrus / Q000378:metabolism; D005260:Female; D007315:Insemination, Artificial / Q000662:veterinary*; D008892:Milk / Q000737:chemistry*; D011247:Pregnancy; D011270:Pregnancy, Animal / Q000378:metabolism*
D004958:Estradiol