Fetal abortion is also likely to occur after 10 weeks of pregnancy and further examination of the cause is recommended to take appropriate measures. Fetal abortion often occurs in the first 3 months of pregnancy, i.e. before 12 weeks of pregnancy, and the chance of fetal abortion decreases significantly after 12 weeks of pregnancy. Within 12 weeks of pregnancy is a period of embryonic instability. Stress, sexual stimulation, abnormal embryonic chromosome development, luteal insufficiency, abnormal thyroid function and immune factors can trigger embryonic arrest or spontaneous abortion. Usually, fetal abortion due to chromosomal abnormalities of both parents often occurs before 8 weeks of pregnancy. If the abortion occurs at 10 weeks of pregnancy, it is mostly related to the influence of harmful factors. Pregnant women during this period should have regular pregnancy tests and pay attention to avoid viral infections and exposure to radioactive substances and harmful chemical substances during pregnancy to avoid the occurrence of fetal abortion. In addition, women in early pregnancy should adjust their diet structure, eat more protein-rich foods, and forbid cold and spicy foods. At the same time, it is also necessary to prohibit sexual intercourse, avoid overexertion and insist on taking folic acid during pregnancy to prevent fetal malformation.