Testosterone and progesterone in peripheral plasma during the oestrous cycle of the mare

in Reproduction
Authors:
P. Silberzahn
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D. Quincey
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C. Rosier
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P. Leymarie
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Summary. Measurements every day or every other day showed that testosterone levels ranging from 15 to 70 pg/ml were higher at oestrus in 4 of the 6 mares studied. In these 4 mares, another testosterone peak occurred 11–13 days before the next oestrus either before (3 mares) or after the fall in progesterone levels.

 

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