How soon after a colt is born can the mare get pregnant?

Answer 1

A mare can potentially get in foal ten days post foaling, however, many mares will ovulate before 10 days post foaling during their foal heat. It is generally believed that

mares the ovulate before the uterus has fully returned to it's normal pre pregnancy

condition (about 10 days to clean and fully involute) cannot maintain a pregnancy.

If no breeding is done during the foal heat the breeder is aware of her ovulation date, she can be short cycled using prostiglandin 5 days post ovulation and she will be receptive in another 5 days. This would place estrus at anywhere from 16 to 20 days post foaling.

If the mare is not short cycled she should return to estrus naturally 14 days post foal heat ovulation at 20 to 24 days (approximate).