Donor category and seasonal climate associated with embryo production and survival in multiple ovulation and embryo transfer programs in Holstein cattle.

@article{Vieira2014DonorCA,
  title={Donor category and seasonal climate associated with embryo production and survival in multiple ovulation and embryo transfer programs in Holstein cattle.},
  author={Leonardo Moreira Vieira and Carlos Alberto Rodrigues and M{\'a}rcio Ferreira Mendanha and Manoel Francisco de S{\'a} Filho and Jos{\'e} N{\'e}lio de Sousa Sales and Alex H. Souza and Jos{\'e} Eduardo P. Santos and Pietro Sampaio Baruselli},
  journal={Theriogenology},
  year={2014},
  volume={82 2},
  pages={204-12}
}
The present study investigated the effect of Holstein donor category (cows vs. heifers) and climate variation (hot vs. cooler season) on the efficiency of in vivo embryo production programs as well as embryo survival after transferred to Holstein recipient cows. A total of 1562 multiple ovulation (MO) procedures (cows: n = 609, and heifers: n = 953) and 4076 embryo transfers (ETs) performed in two dairy herds were evaluated. Donor cows had greater number of CLs (10.6 ± 0.6 vs. 7.5 ± 0.4; P < 0… CONTINUE READING