ウシの一次性比に影響する要因について

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  • Factors Affecting the Primary Sex Ratio in Cows

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In the dairy and beef cattle industries, artificial insemination and embryo transfer are common. Many studies have demonstrated a skewed sex ratio in the calves derived from assisted reproductive technologies. During the period between insemination and calving, insemination condition and the environment in which embryo development occurs are believed to affect the sex of an embryo. This short review looks at studies of factors that have been reported to affect the primary sex ratio of bovine embryos, including the timing of insemination, sperm and oocyte status, and maternal conditions.<br>

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