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Oestrus Behaviour - Anatomy & Physiology (view source)
Revision as of 11:35, 1 August 2008
, 11:35, 1 August 2008→Progesterone Levels
=== Progesterone Levels ===
=== Progesterone Levels ===
* Low plasma or milk progesterone.
* Low plasma or milk progesterone indicates that the cow is close to, or in oestrus.
* Milk progesterone assays can be used routinely on alternate days from 25-30 days postpartum.
* Sampling of milk progesterone to check oestrus identification can be counterproductive: aware that the purpose of this measurement is to ‘investigate’ their
* Sampling of milk progesterone to check oestrus identification can be counterproductive: aware that the purpose of this measurement is to ‘investigate’ their
accuracy of oestrus detection, farm staff may be tempted only to sample cows that are definitely in oestrus during the period of checks.
accuracy of oestrus detection, farm staff may be tempted only to sample cows that are definitely in oestrus during the period of checks.