CD40LG and cytomegalovirus infection: In the reported study, we investigated the prevalence of specific anti-HCMV IgG and IgM antibodies and the socioeconomic risk factors of HCMV infections in a group of pregnant women from Poland attending outpatient obstetric clinics and hospitalized between 2010 and 2011 at the Polish Mother’s Memorial Hospital Research Institute (PMMHRI) and at the Ludwig Rydygier Hospital in Lodz.