Cyclosporine has a fetus-preserving effect on immune abortion. The specific duration of administration needs to be decided according to the patient’s condition, generally until about 12 weeks of pregnancy, when the fetus is initially developed and more stable. However, if the pregnant woman still has vaginal bleeding or other abnormal conditions, it is recommended to ask the doctor whether to extend the duration of the dose. Cyclosporine is an immunosuppressant and should not be taken by normal pregnant women. It is mainly indicated for women with immune miscarriages. Most of the miscarriages caused by immune factors are due to the mother’s immune rejection of the fetus, and cyclosporine can inhibit such immune cells, thus playing a role in preserving the fetus. At the same time, cyclosporine facilitates the growth of trophoblast cells during pregnancy and induces maternal-fetal interface tolerance, which doubly regulates the pregnancy process, thus achieving the effect of fetal preservation. Note that cyclosporine is an immunosuppressant, which can lead to a decrease in the immunity of the body and has potential risks of use for pregnant women and fetuses. Therefore, do not use cyclosporine blindly on your own. Pregnant women with immune miscarriage should only use it under the guidance of a doctor.