Influence of biostimulation on reproduction in postpartum beef cows.

摘要: Three experiments were conducted to evaluate the effects of biostimulation (exposure bulls or androgenized females) on various reproductive variables in suckled beef cows. Bulls testosterone-treated cows (TTC) introduced cows, randomly allotted one four groups, within 72 h postpartum. In Exp. 1, Groups 1 and 3 exposed 2 4 TTC. 2, served as controls (isolated from biostimulation). 3, TTC controls. Mean postpartum intervals estrus not different between either (P greater than .10). However, had reduced (44 41 d, respectively) compared with control (52 d; P less .05). Fewer at 40 d .05; 3) 60 No differences observed groups any experiment for pregnancy These data indicate that immediately after calving return earlier do isolated biostimulation.