igg is generally written as IgG, and a high IgG antibody to cytomegalovirus in a pregnant woman indicates that she has had a cytomegalovirus infection. If a pregnant woman has symptoms or tests positive for IgM antibodies, cytomegalovirus infection is active. A high IgG antibody to cytomegalovirus in a pregnant woman without obvious clinical symptoms indicates a previous infection with cytomegalovirus. Positive cytomegalovirus IgG antibody alone has no effect on the pregnant woman or the fetus. If a pregnant woman with high cytomegalovirus antibody IgG is also tested positive for IgM antibody, it indicates that cytomegalovirus infection is in an active phase. In the above case, a very small number of pregnant women may experience uncomfortable symptoms such as low-grade fever, fatigue and headache. In case of initial cytomegalovirus infection during pregnancy, the chances of causing fetal abnormalities are relatively higher. High cytomegalovirus antibody IgG in pregnant women also needs to be analyzed according to specific test results, and it is recommended to consult a professional doctor to avoid other serious consequences.