CASE: A 36-year-old woman had a routine ultrasound at 32 weeks' gestation. Fetal ultrasound scan showed marked edema in the developing single live fetus. She has two children, 12 years old and 6 years old. Both children were born in her country before she migrated to USA. She said, only thing she remembers from her past pregnancies was that she got few shots during pregnancy. Obstetrician ordered blood studies from the mother, father and fetal card blood which is shown below. Mother: O Group Rh Negative Father: A Group Rh Positive Fetal cord blood: A Group and Rh Negative What are the differentials? What investigations help us in diagnosis? Explain the abnormal investigations due you see in this patient? Most likely final diagnosis?