Association Between Maternal Anti-Ro and Anti-La Antibody Levels and Congenital Heart Block: a 20-Year Cohort Study

To evaluate the association between maternal anti-Ro and anti-La antibody levels and the occurrence of congenital heart block (CHB) in fetuses and newborns. This retrospective cohort study included 182 pregnant women with positive anti-Ro and/or anti-La antibodies who received prenatal care at our tertiary center between 2002 and 2022. Maternal clinical, laboratory, and obstetric variables were analyzed. Thirteen fetuses (7.1