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Oestrus Behaviour - Anatomy & Physiology (view source)

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→‎Clinical Methods and Assessments for Oestrus Detection

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=== Standing to be Mounted ===

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Although pedometers are increasingly being used and in-line milk progesterone tests are being developed, the most reliable method for determining the optimum timing of artificial insemination (AI) is the observation of cows standing to be mounted (STBM).

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* Ovulation occurs approximately 30 hours after the first display of STBM, which in turn is 24 hours after the LH surge.

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* The optimum time to inseminate in order to achieve the best conception rates is six to 24 hours after the first observed STBM.

=== Progesterone Levels ===

Lwilkie

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