Recipients’ and Environmental Factors Affecting the Pregnancy Rates of a Large, Fresh In Vitro Fertilization-Embryo Transfer Program for Dairy Cows in a Commercial Herd in China by Chengyun Xie, Cong Huang, Longgang Yan, Ruiqi Yao, Jinbang Xiao, Mingmao Yang, Huatao Chen, Keqiong Tang, Dong Zhou, Pengfei Lin, Aihua Wang, Yaping Jin

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