Acta Veterinaria et Zootechnica Sinica ›› 2020, Vol. 51 ›› Issue (5): 907-913.doi: 10.11843/j.issn.0366-6964.2020.05.002

• REVIEW • Previous Articles     Next Articles

Factors Associated with Early Embryo Loss in Dairy Cows

LUO Fang, ZHANG Meng, LI Yachao, CHEN Yonghong, TAO Jinzhong*   

  1. School of Agriculture, Ningxia University, Yinchuan 750021, China
  • Received:2019-11-11 Online:2020-05-25 Published:2020-05-16

Abstract: Early embryo loss, that is, embryo death before implantation, is the leading factor determining the pregnancy rate in dairy cows. The high mortality of embryo before implantation in dairy cows brings tremendous economic losses to many farms. At present, it is generally recognized that early embryo loss is mainly related with chromosomal abnormalities, reproductive hormone disorders, heat stress, immune factors, twin pregnancy, diseases and vitamin B deficiency. The factors affecting early embryo loss are reviewed in order to provide a comprehensive reference for preventing early embryo loss in dairy cows.

Key words: early embryo loss, chromosomal abnormalities, hormones, heat stress, immunity, twin pregnancy, folic acid, vitamin B12

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