There are several methods a veterinarian can use to abort a conceptus/fetus.
Saline injection into the heart, prostiglandin injection to the mare before 35 days post conception, a series of prostiglandin injections after day 35.
Unimplanted concepti can be moved and crushed against the pelvic brim (often used to reduce one conceptus when there are twins).
Procedures become more complicated and dangerous as pregnancy progresses.
Once the safety of the mare comes into question it is probably advisable to allow her to foal and either have the foal euthanized or find a willing adopter.
No. It can cause damage to the fetus but not abort.
There are a few states that will abort a 3 month old fetus. You will need to call your local abortion clinic for locations.
Yes.
No. It can cause damage to the fetus but not abort.
yes ,like other mammals it does
Cortal is Aspirin and can cause fetal damage but not abort.
an unborn horse fetus, just like an unborn human fetus.
No, aspirin and alcohol can not be sued for abortion.
Is it moral to abort an embryo/fetus based solely on gender?
If you were to miscarry one twin the other fetus can still survive, but the chances for that are SLIM!!
Yes, a women in a third world country had her fetus die and her body did not abort it, 35 years later, see had complications from it and the body had encased the fetus in calcium.
If you mean intentionally, you have to abort. If you are asking why women do, over 50% are thought to be chromosomal abnormalities in the fetus.