Hemolytic Disease of the Newborn Associated with Anti‐Jk3

This report documents a mild case of hemolytic disease of the newborn (HDN) associated with anti-Jk3. The Filipino mother had previously had six children none of whom had been affected by HDN. She had been transfused at the time of her second pregnancy. Anti-Jkb and anti-Jk3 were detected in the maternal serum at the time of her seventh delivery. No prenatal serologic tests for blood group antibodies had been performed. The cord blood was found to have a positive direct antiglobulin test and anti-Jkb plus anti-Jk3 were eluted. The infant was treated with phototherapy.