HorseRepro.com

Cycle

Reproductive Cycle

Pregnancy - This section depicts the cycle from conception to foaling and back to re-breeding the next year.

Seasonal Estrous Cycle - This section details the changes that occur in the estrous cycle with changes in the daylight length (seasonal changes)

Ovarian (Estrus/Diestrus) Cycle - This section describes the ovarian and hormonal changes that occur during the ~21 day estrous cycle in the mare which includes a 5-7 day estrus period and a 14-15 day diestrus period.

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