Predictive value of <scp>gB2</scp> antibodies for maternal–fetal transmission after primary cytomegalovirus infection treated with valacyclovir

In women with a primary CMV infection treated with valacyclovir, the presence of gB2-specific IgG antibodies on immunoblot analysis identifies a subgroup with a low residual risk of maternal-fetal transmission. Incorporating gB2-specific IgG antibodies status into risk stratification may improve patient counseling and clinical decision-making. © 2026 The Author(s). Ultrasound in Obstetrics & Gynecology published by John Wiley & Sons Ltd on behalf of International Society of Ultrasound in Obstetrics and Gynecology.