Web10-15% of cows and heifers that fail to conceive return to heat at intervals greater than the normal 20-21 days. This is caused by late (occurring 16 or more days after insemination) embryo mortality in these cows or heifers. Key fact How long cows remain in standing heat. In beef cows and heifers the reported average duration of Web15 nov. 2024 · The 1/4 cc straw responds to temperature changes faster than the 1/2 cc straws (more subject to cold shock). The fertility of cattle inseminated with frozen-thawed semen packaged in 1/4 or 1/2 cc straws also has been the subject of research for more than 40 years, often with conflicting results, conclusions, and interpretations. Fertility studies
8-step guide to artificially inseminating a dairy cow
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Artificial Insemination for Cattle l How to AI a Cow - YouTube
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