Hemolytic Disease of the Newborn

**Semantic type:** Disease or Syndrome

**Definition:** A disorder of the fetus or newborn that occurs when fetal cells that are coated with IgG alloantibodies from the mother attack antigens inherited from the father. Severity can range from absence of symptoms to death.

**Synonyms:** - Erythroblastosis Fetalis - Erythroblastosis Fetalis - HDFN - Hemolytic Disease of the Fetus or Newborn - Isoimmune Hemolytic Disease of the Newborn