Hematology
1609 — Louise Bourgeois, French midwifery records describing hydrops fetalis
Rh disease, historically known as erythroblastosis fetalis, was a devastating condition affecting newborns whose mothers carried incompatible blood antigens. For centuries physicians observed its deadly effects without understanding its immunological origins. The unraveling of its cause in the mid-twentieth century represented one of the most consequential breakthroughs in the history of perinatal medicine.
Historical Narrative
The earliest recognizable descriptions of what later came to be understood as Rh disease appeared in European midwifery literature of the seventeenth century, where accounts described severely jaundiced or hydropic newborns who died shortly after birth, often following previous pregnancies in which similar tragedies had occurred. French midwife Louise Bourgeois documented cases of hydrops fetalis in 1609, noting the pattern of swelling and death in infants born to mothers who had previously lost children under comparable circumstances, though she had no framework for explaining the underlying mechanism.
For the next three centuries, the condition was catalogued under various names — hydrops fetalis, icterus gravis neonatorum, and erythroblastosis fetalis — each label reflecting only observable features rather than cause. Physicians in the nineteenth century noted that the affected infants showed dramatic enlargement of the liver and spleen alongside profound anemia, and pathologists began connecting these findings to abnormal proliferation of immature red blood cells in fetal tissues. Yet the link between successive pregnancies and worsening outcomes remained a clinical puzzle that humoral and later bacteriological theories of disease could not adequately explain.
The pivotal transformation in understanding arrived in 1940, when Karl Landsteiner and Alexander Wiener, building on Landsteiner's earlier discovery of the ABO blood group system in 1901, identified a new antigen present on the red blood cells of rhesus macaque monkeys and most human beings. They designated it the Rh factor. Concurrently, Philip Levine and Rufus Stetson had published a landmark 1939 case report describing a woman who suffered a severe transfusion reaction following delivery of a stillborn hydropic infant. Levine recognized that her serum agglutinated her husband's blood and proposed that she had been immunized by her fetus, whose blood had entered her circulation during delivery. This work established that the mother's immune system was mounting a response against fetal red cell antigens inherited from the father, and that antibodies crossing the placenta in subsequent pregnancies destroyed fetal red cells on a catastrophic scale.
Through the 1940s and 1950s, researchers worked to understand the precise immunological cascade. Wiener and Levine debated nomenclature and mechanism throughout their careers, and their productive rivalry sharpened the field's understanding of antigen inheritance patterns. The clinical consequence was that obstetricians began testing maternal blood and tracking antibody titers in sensitized women.
The next watershed came in 1963, when New Zealand physician A. William Liley performed the first successful intrauterine blood transfusion, threading a needle through the mother's abdomen into the fetal peritoneal cavity to deliver compatible red cells to a severely anemic fetus. Liley's technique demonstrated that intervention before birth was possible and transformed the management of affected pregnancies.
The story reached its most celebrated chapter when researchers in the 1960s, particularly Ronald Finn in Liverpool and Vincent Freda, John Gorman, and William Pollack in New York, pursued the hypothesis that injecting Rh-negative mothers with Rh immunoglobulin shortly after delivery could prevent sensitization entirely by neutralizing fetal red cells before the maternal immune system mounted a lasting response. Clinical trials validated this preventive strategy, and by the late 1960s the approach had been introduced into obstetric practice, fundamentally altering the historical trajectory of the disease.
Key Historical Figures
Historical narrative only — this page describes how Rh disease was understood historically. It is not medical advice and does not describe current diagnosis or treatment. Sourced from verified medical history references (NIH, Encyclopaedia Britannica, and standard medical history texts). See our medical disclaimer.