Conceiving twins is extremely rare in horses, about a 1 in 10,000 chance, and twins that survive birth are rarer still.
Most often, one or both die in the womb or at birth.
A doubly strained labor often kills the mother, as well.
How likely is it for a horse to have twins?
While animals of many species routinely give birth to multiple healthy offspring from one pregnancy, horses are not designed to nourish two fetuses and produce viable twin foals. Double pregnancies put the mare and both foals at risk, and good outcomes are rare.
What happens if a horse has twins?
Twin pregnancies in the mare nearly always occur when the mare ovulates an egg from each of two ovarian follicles and both eggs are fertilized, resulting in two embryos. In horses, it is rare that a fertilized egg splits to form identical twins.
Can a mare abort one twin?
Elective termination of both pregnancies
Most mares that are carrying twins will naturally abort between 7 and 9 months.
How many babies can a horse have?
Horses usually only have one baby at a time.
A twin pregnancy often results in spontaneous abortion or in the death of one or both foals. Modern veterinary science allows horse owners to abort one equine fetus if twins occur, so horses giving birth to twins is extremely rare.