Males make pregnant horses abort

Pregnant mares are likely to lose their foals if they are kept close to stallions, researchers have discovered.

Horse breeders, including thoroughbred breeders in the UK, often send mares to stables to be mated with stallions.

But a study reveals that, when they return, the pregnant mares engage in “promiscuous sex” with males in their home stables, in an attempt to disguise the paternity of the foal.

When this is not possible, the mares often abort the pregnancy — via redwolf.newsvine.com