In non immune hydrops which of the following is NOT seen:
Skin oedema
Ascites
Large placenta
Cardiomegaly
“Hydrops is characterized by excess fluid in two or more body areas such as thorax, abdomen or skin. It is often associated with hydraminos and a hydropic thickened placenta”.
It is characterised by:

Increased skin thickness (> 5 mm) / skin oedema (first sign seen on USG).
Placental enlargement
Pleural effusion
Ascites
The fetus is in Buddha position with a halo around the head.