Persistence of IgM antibodies to cytomegalovirus-induced late antigen in pregnancy and postpartum.

21 women with IgM antibodies to cytomegalovirus-induced late antigen (CMV LA) as determined in the first, second or third trimester were tested for the persistence of these antibodies during pregnancy and postpartum. Out of 21 women 16 still showed IgM antibodies against CMV LA by 6-9 months after delivery. No striking differences could be found between women with primary or recurrent CMV infections as well as those who had intrauterine infection.