The abortifacient is a medication that is used when symptoms of preterm miscarriage or preterm labor occur during pregnancy. There are many different types of pregnancy prevention drugs, depending on the type of miscarriage or preterm labor and the cause of the miscarriage, different types of drugs are needed for pregnancy prevention treatment. Commonly used anti-fetus drugs include: 1) progesterone, such as progesterone, progesterone, methylhydroxyprogesterone tablets; 2) chorionic gonadotropin; 3) anticoagulants; 4) drugs used to inhibit uterine contractions, such as magnesium sulfate injection and salbutamol sulfate; 5) vitamin drugs, such as vitamin E and folic acid tablets; 6) proprietary Chinese medicines to protect the fetus, such as kidney and fetus pills.