Bart's hydrops fetalis is lethal because: (A) Hb Bart's cannot bind oxygen, (B) Hb Bart's cannot release oxygen to fetal tissues, (C) Microcytic red cells become trapped in the placental, (D) The excess a - globin form insoluble precipitates
Answer is B. Bart hydrops fetalis is a lethal complication of alpha thalassemia trait where oxygen can't release from hemoglobin