temps (durée) (1) ferme (exploitation) (1) méthode (1) bétail (bovins) (1) Artificial insemination (1) Rates (1) Ultrasonic imaging (1) Time (1) Signs and symbols (1) Signs and signboards (1) Serum (1) Progesterone (1) Pregnancy (1) Possibility (1) Estrus (1) Estrogen (1) Estradiol (1) Enzyme-linked immunosorbent assay (1) Day (1) Cows (1) Corpus luteum (1) Conception (1) Cattle (1) Blood (1) Artificial insemination (1) Animals (1) Rates (1) Pregnancy (1) exploitation agricole (1)