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Not in the scientific sense - a human female's period is when the lining of the uterus is sloughed off after the ovum is not fertilized. Mares do not go through a cycle of uterine wall build-up then sloughing, so they do not have periods. However, mares do go through heat cycles approximately every 21 days in which the mare is fertile and receptive to intact males.

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13y ago

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