Fertilization and embryonic mortality rates in beef heifers after artificial insemination

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Abstract

A total of 256 beef heifers, in 2 experiments, was used to establish fertilization rate and subsequent embryo survival rates. Fertilization rate following a single artificial insemination was 90%. Pooled estimates of embryo survival showed high survival rates up to Day 8 (93%) but markedly reduced (P<0.001) survival at Days 12 (56%), 16 (66%) and 42 (58%). It is suggested that most embryonic mortality occurs between Days 8 and 16.

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Diskin, M. G., & Sreenan, J. M. (1980). Fertilization and embryonic mortality rates in beef heifers after artificial insemination. Journal of Reproduction and Fertility, 59(2), 463–468. https://doi.org/10.1530/jrf.0.0590463

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