	Symptoms of the disease may vary in each pregnancy. They are usually not noticeable during pregnancy. However, prenatal tests may reveal yellow colouring of amniotic fluid, which is caused by the buildup of bilirubin. Splenomegaly, cardiomegaly and hepatomegaly may occur in the baby. Excessive tissue fluid may accumulate in the stomach, lungs or scalp. These are typically signs of hydrops fetalis.