Positive syphilis antibodies in pregnant women need to be determined by the presence of a viral infection to determine if it will affect the fetus; if the patient currently has a syphilis infection in her body, it will affect the fetus. If the patient has had a previous syphilis infection that has been cured, it usually does not affect the fetus. Syphilis antibodies can be categorized into syphilis spirochete-specific antibodies and syphilis spirochete non-specific antibodies. If a pregnant woman is positive for both antibodies, she is currently infected with syphilis, which can affect the fetus because the syphilis spirochete can be transmitted to the fetus through the placenta, which can easily lead to malformation or miscarriage of the fetus. If a pregnant woman is positive for syphilis-specific antibodies but negative for non-specific syphilis antibodies, it means that the patient has been infected with syphilis, but there is no active syphilis spirochete in the body at the moment, and is not infectious, so pregnancy at this time usually does not have an effect on the fetus, and regular checkups can be done. It is recommended that pregnant women with positive syphilis antibodies should consult a doctor in time, and the doctor will determine whether the pregnancy will have an effect on the fetus according to the condition of the pregnant woman.