erythroblastosis fetalis

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. A severe hemolytic disease of a fetus or newborn infant caused by the production of maternal antibodies against the fetal red blood cells, usually involving Rh incompatibility between the mother and fetus.

Wiktionary

1. n. A medical condition where an rh negative mother's antibodies attack the red blood cells of an rh positive fetus.

WordNet 3.0

1. n. severe anemia in newborn babies; the result of Rh incompatibility between maternal and fetal blood; typically occurs when the child of an Rh-negative mother inherits Rh-positive blood from the father; can be diagnosed before birth by amniocentesis