If it is determined that the embryo or fetus has abnormal development (malformation), etc., abortion can be performed at any time during the pregnancy. However, if the fetus or embryo is well developed, abortion can only be performed before the 28th week of pregnancy. When the embryo develops to the 28th week of pregnancy, it is a viable child under Chinese law. At this time it is equivalent to a normal baby and can survive after birth. Therefore, if the fetus is more than 28 weeks old, the state stipulates that abortion cannot be induced if there is no abnormality. However, abortion can be performed if the fetus itself has developmental malformations or other neurological related problems, or if the mother herself has underlying diseases that make it difficult to continue the pregnancy and there are risks. In addition, patients should be aware that abortion is irreversible damage to the organism, so abortion is usually not recommended if not necessary.