Nonimmune hydrops fetalis secondary to premature closure of the foramen ovale.


Premature closure of the foramen ovale is a rare cardiac anomaly. Severe right-sided heart failure accounts for the hepatomegaly, ascites, pleural and pericardial effusions, and generalized edema of these hydropic fetuses. Premature closure of the foramen ovale should be a part of the differential diagnosis when unexplained fetal hydrops is encountered. 


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