how many foals can a horse be pregnant with
The average mare has a pregnancy of about 335 days, but normal pregnancies occasionally last over 365 days. The defining aspect of the last part of the equine pregnancy is that the fetus gains size and weight most rapidly during this time, doubling in size and weight during the last 4 to 6 weeks.he mare uses more energy â and requires more nutrition â from the last 6 weeks of pregnancy through the first 6 weeks after foaling than she does at any other time. For a mare that enters the last months of pregnancy in poor condition, it can be very difficult to feed enough to improve her condition.