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- Gestation (pregnancy) lasts 330 to 342 days, with lighter breeds generally having a longer pregnancy (340 to 342 days) than heavier breeds (330 to 340 days).
www.msdvetmanual.com/horse-owners/routine-care-and-breeding-of-horses/breeding-and-reproduction-of-horses
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Although the mare continues to ovulate regularly every 21 days throughout the breeding season, the length of estrus (sexual receptivity) varies from 2–8 days, and the length of diestrus varies accordingly to maintain a 21-day interval.
Jan 12, 2017 · Keep in mind, there are a couple different things that can make your broods look or carry slightly differently from my examples. Of these, back length and overall weight (not build) are the two largest factors. A horse that is obese may not show pregnancy early and each turn may offer slightly less visually than a moderately-weighted horse.
Horses can be capable of breeding from 18 months old, but domesticated horses are usually allowed to mature to at least three years old before breeding. Gestation lasts between 11 and 13 months, depending on the breed, and usually results in the birth of just one foal.
Apr 1, 2021 · Once frozen, the semen can last for many years, extending the availability of that semen long after the stallion has passed on. When the mare comes into season, her ovulation can be timed, and the semen defrosted and inseminated as close to ovulation as possible.
Jan 31, 2020 · A correctly functioning reproductive tract is essential to the potential fertility of a broodmare. The tract goes through various changes as a mare exhibits estrous cycles. A good working knowledge of a mare’s anatomy and these changes will aid in early identification of potential abnormalities.
May 9, 2014 · A balanced broodmare diet will decrease the risk of retardation of the fetus, which can cause altered development and may influence the horse during fetal, neonatal or even adult life performance. An evaluative method of the nutritional needs of a broodmare is the “Body Condition Score” (BCS).
Any mare who will be a broodmare should have her first foal between 5 and 10, during her optimum fertility years. Mares who have had foals their whole lives can continue to have foals into their early 20s. A maiden mare, or one who’s never had a foal, should be bred no later than 14.
