CD40LG and cytomegalovirus infection: To determine whether the observed increased HCMV-specific IgG responses in cCMV-transmitting women was attributable to timing of maternal HCMV infection or exposure, we explored whether there were differences in plasma HCMV-specific IgM detection, IgG avidity, or HCMV DNAemia between the cCMV-transmitting and non-transmitting women.