Failure of conception in dairy cattle: progesterone and oestradiol-17 beta concentrations and the presence of ovarian follicles in relation to the timing of artificial insemination.
D000818:Animals; D002417:Cattle / Q000502:physiology*; D004958:Estradiol / Q000032:analysis*; D004971:Estrus; D005260:Female; D005298:Fertility; D007315:Insemination, Artificial / Q000662:veterinary*; D008892:Milk / Q000032:analysis; D010053:Ovary / Q000502:physiology*; D010060:Ovulation; D011247:Pregnancy; D011374:Progesterone / Q000032:analysis* / Q000097:blood; D013997:Time Factors
D011374:Progesterone; D004958:Estradiol