Figure 1

Experimental design used to evaluate ovarian follicular dynamics (n = 40) and pregnancy rate to timed artificial insemination (TAI; n = 1,428) in Nelore cows presenting different antral follicle counts (AFCs) and subjected to an ovulation synchronization protocol based on progesterone and oestrogen. P4 progesterone, EB oestradiol benzoate, EC oestradiol cypionate, eCG equine chorionic gonadotrophin, PGF2α cloprostenol, CL corpus luteum, US ultrasound, VL-AFC very low AFC, L-AFC low AFC, I-AFC intermediate AFC, H-AFC high AFC.