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| == Blood Testing == | | == Blood Testing == |
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| + | * Blood tests to measure progesterone concentration. |
| + | * Level of progesterone required to maintain pregnancy varies. |
| + | ** Cria have been born to dams with very low plasma progesterone concentrations. |
| + | * Variability makes blood tests unreliable. |
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| == Rectal Examination == | | == Rectal Examination == |
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| == Foetal Heartbeat == | | == Foetal Heartbeat == |