Hormonal strategy to reduce suckled beef cow handling for timed artificial insemination with sex-sorted semen

Two experiments were conducted to assess a hormonal strategy developed to reduce animal handling for timed artificial insemination (TAI) with sex-sorted semen. Four-hundred ninety-one (491) suckled beef cows received a progesterone (P4) intravaginal device and 2  mg intramuscular (im) injection of estradiol benzoate (EB) on a randomly chosen day of the estrus cycle (Day 0) in Experiment 1. Cows were treated with 500 μg of sodic cloprostenol (PGF2α) and with 300 IU of eCG at P4 device removal (Day 8); these cows were also randomly assigned to receive 1  mg of estradiol cypionate (EC) administered at P4 device removal (treatment EC-0h) or 1 mg of EB 24 h after P4 device removal (treatment EB-24h).

Source: Theriogenology - March 22, 2018 Category: Genetics & Stem Cells Authors: M.A.V. Silva, C.S. Santos, I.G. Fran ça, H.G. Pereira, M.F. Sá Filho, B.G. Freitas, B.M. Guerreiro, A. Faquim, P.S. Baruselli, J.R.S. Torres-Júnior Source Type: research