Heparin injections are usually given to pregnant women during pregnancy to prevent intravascular thrombosis. It usually takes until the third trimester of pregnancy, when the condition of the fetus is almost stable, to stop injecting heparin.
When a woman has recurrent miscarriages, when test results suggest thrombophilia, or when a woman has autoimmune diseases such as anticardiolipin antibody syndrome or systemic lupus erythematosus, she needs to be injected with heparin early in pregnancy to prevent intravascular thrombosis. Usually heparin injections are needed up to the third trimester, when the fetus’ basic condition has stabilized and the injections can be stopped.
However, some pregnant women with thrombosis disease or previous thrombosis, the injection of heparin during pregnancy to protect the fetus may take longer, and some can not stop injecting heparin until one week before delivery.
The exact duration of heparin injections for fetal preservation is related to the physical condition of the pregnant woman, and pregnant women who need heparin injections for fetal preservation are recommended to take the injections under the guidance of the doctor.