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Determinations of IgG and IgM antibodies specific for cytomegalovirus (CMV), herpes simplex virus (HSV1), herpes simplex virus (HSV2), varicella-zoster virus (VZV), rubella, echo, Coxsackie and morbilli viruses were performed in 20 sera from malformed fetuses. Demonstration of a fetal infection by increased fetal serum IgM permits linkage to a detected fetal malformation. In parallel, 14 maternal sera and 17 amniotic fluid samples were examined. Laser nephelometry (a quantitative method) was used for the determination of IgM and IgG class immunoglobulins. None of the fetal sera were found to contain IgM class antibodies specific for the viral antigens studies. While IgM CMV-specific antibodies were present in one maternal serum, the specific IgM was absent in the fetus. The absence of specific IgM antibodies appears to warrant the conclusion that the malformed fetuses were uninfected by any of the above viruses. IgM antibodies were detected in two fetal sera by quantitative methods. The IgM antibodies present in two fetuses probably were generated in response to some other introduced antigen.

journal of perinatal medicine

Is there an association between fetal viral infection and fetal malformation? I. Detection of specific IgM antibodies in the serum of malformed fetuses