For pregnant women, if they take some drugs prohibited by pregnant women, it will easily lead to abortion, such as common drugs for promoting blood circulation and removing blood stasis, which are generally some traditional Chinese medicines, such as safflower, motherwort and peach kernel.

There are also some western medicines that may affect the normal growth of embryos and lead to abortion, such as commonly used chemotherapy drugs, immunosuppressants, and drugs for treating abnormal blood coagulation.

However, because each woman's embryo growth and development is different after pregnancy, even taking these drugs, it is not 100% that can lead to abortion, and some women may not necessarily lead to abortion even taking mifepristone tablets. However, these drugs may have adverse effects on embryos, so it is recommended that women should not take them during pregnancy to avoid abortion.