A positive IgG antibody to rubella and cytomegalovirus indicates previous infection with cytomegalovirus and rubella virus, but it is not possible to determine if the infection is also present. It may be a primary infection or a recurrent infection, but normal adults usually do not show significant symptoms. If fever or rash is present, treatment may be indicated, but if not treated, no significant damage is usually done. It is only when these two viruses are infected in pregnant women that they may cause serious harm, as they can cause fetal malformations and have a relatively high probability of causing fetal malformations. In principle, termination of pregnancy is recommended if it is in the early stages of pregnancy. If the pregnancy is to be continued, amniocentesis can be performed at 21 weeks or cord blood can be taken to check for IgM antibodies to determine if the child is infected, and if infected, termination of pregnancy is also recommended.