VGO-0145
QUESTION
The best time to breed a dairy cow is?
OPTIONS
(A) Towards end of the oestrus
(B) After completion of the oestrus
(C) At the beginning of the oestrus
(D) Middle of the oestrus
ANSWER
(A) Towards end of the oestrus
EXPLANATION
Breeding toward the end of standing estrus places viable sperm in the reproductive tract before the cow's postestrous ovulation and allows time for capacitation. Breeding at the very beginning may be unnecessarily early, while waiting well after estrus can be too late. Mid-estrus breeding can also result in conception, but the late-estrus choice best matches the traditional timing principle for conventional semen.
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Veterinary Gynaecology and Obstetrics · 240 Questions
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