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Key Clinical Message Fetal bradycardia and congenital complete heart block could be the presentation of neonatal lupus. A high index of suspicion of this condition helps to identify an asymptomatic mother. Abstract Neonatal lupus erythematosus (NLE) is a rare acquired autoimmune disease of newborns due to placental transfer of Ro/SSA or La/SSB autoantibodies. Though cardiac, cutaneous, hematological, and hepatobiliary abnormalities are detected, cardiac defects cause significant morbidity and mortality. We report a case of complete congenital heart block due to NLE.