Cytomegalovirus antibodies can be categorized into IgG and IgM. If IgG is elevated but IgM is negative, it suggests that immunity is now present; if IgG is elevated combined with high IgM or IgG is negative but IgM is elevated, it suggests that infection is ongoing, which may lead to the risk of fetal malformation. Cytomegalovirus antibody test is a pre-conception and pregnancy test. Cytomegalovirus can infect the fetus and cause fetal malformation. Cytomegalovirus antibodies can be categorized into IgG and IgM antibodies. Elevated levels of these two types of antibodies have different clinical significance. If the cytomegalovirus IgG antibody is high but the IgM antibody is negative, it means that the baby has been infected in the past and is now immune to the virus, so there is no need to intervene in the treatment. If the IgG antibody is high and the IgM antibody is elevated, or if the IgG antibody is negative but the IgM antibody is elevated, it suggests that there may be an intrauterine or maternal infection, and the patient needs to go to the hospital as soon as possible.