High herpes simplex virus IgG may have an effect on pregnancy. A high herpes simplex virus IgG indicates that there has been a previous herpes simplex infection, and the body has now produced a large number of antibodies, which, if combined with an increase in IgM antibodies, can have an effect on pregnancy. There are two ways in which herpes simplex virus IgG can affect pregnancy; 1. If there is a herpes simplex virus infection with high lgG in the recent past, then the IgM antibody will also be increased. Increased IgM antibody indicates that the body is currently infected with the herpes simplex virus, and if you are pregnant, consider that the virus may have some effect on the fetus, and you should consult your doctor for pregnancy-related precautions. 2. Only herpes simplex virus IgG is too high and IgM is negative, which means that herpes simplex virus has been infected in the past, and now the body has produced sufficient amount of antibodies, and there is no activity, which has less effect on pregnancy. If the herpes simplex virus IgG is too high, it should be combined with the IgM to determine whether it has any effect on pregnancy. It is recommended that you actively seek medical advice and prepare for pregnancy reasonably under the guidance of your doctor.