When a woman is 45 to 50 days pregnant, if an ultrasound has confirmed an intrauterine pregnancy with the presence of a fetal heart and germ, it is usually not necessary to perform another test in the second month of pregnancy. If embryonic abortion occurs in the second month of pregnancy, the following signs may occur: first of all, the nausea and vomiting of early pregnancy will suddenly disappear, and the chest pain will also be reduced or disappear completely, and a small amount of vaginal bleeding and abdominal pain may occur after the abortion. The bleeding may be as heavy as menstruation. However, most women will go to the hospital for gynecological ultrasound to confirm the diagnosis when there is a small amount of vaginal bleeding or a slight abdominal pain, and once the diagnosis of embryonic abortion is confirmed, then abortion will be done directly to terminate the pregnancy because there is no treatment for embryonic abortion. For women with recurrent embryonic abortions, a comprehensive preconception test is needed, such as blood clotting, thyroid function, TORCH and infertility antibodies, as well as HPV and mycoplasma infections. There are many causes of embryonic abortion, so it is necessary to check and diagnose the causes first in order to avoid the recurrence of embryonic abortion.