Under the AM-PM rule for artificial insemination in cattle, when is a cow first observed in heat in the morning usually inseminated?
Correct answer: A. The same afternoon
- A. The same afternoon
- B. The same morning
- C. The next morning
- D. Two days later
Explanation
The AM-PM rule recommends inseminating a cow during the opposite part of the day from when standing oestrus is detected. Thus, a cow seen in heat in the morning is generally inseminated in the afternoon.
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About Theriogenology and Animal Reproduction
Covers the reproductive anatomy and physiology of male and female domestic animals, including puberty, oestrous cycles, ovulation, fertilisation, pregnancy, parturition and lactation. It also includes artificial insemination, semen evaluation, pregnancy diagnosis, infertility, dystocia and reproductive disorders, with attention to species differences.
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