Originally Posted by NdAppy
Sunny that's 12 months. Typical gestation for a horse is about 11 months or 340 days.
If the mare's last cover date was March 30, 2012, the 340 day mark was March 4, 2013 and there are plenty of mares that go well past that. Many go 350-365 days. But if the mare stayed in with the stud for several months, it may have been sometime in April or even May when the mare conceived.