Hydrops Fetalis

Severe edema that develops before birth. The excess fluid collects in the body cavities, particularly in the peritoneal cavity (ascitis) and the pleural cavity.
which can be recognized by the USS.

The most common cause is severe anemia associated with hemolytic disease of the newborn.
It can also occur with a twin-to-twin transfusion.

Other causes are congenital heart diseases, kidney diseases and lung diseases.

Treatment
intra uterine blood transfusion to the fetus.