Autopsy photographs of a newborn with hemoglobin Bart's hydrops fetalis syndrome, delivered by caesarean section at 31 week of gestation.59 Despite active resuscitation, the infant died within an hour after birth. Note edema of face and abdominal distension (A). The thoracic cavity is filled by the pericardial sac distended by effusion and cardiomegaly; there is massive hepatomegaly (B). Pictures courtesy of Prof H.A. Heggtveit.