**Abstract**

The abnormal accumulation of fluid in two or more fetal space and in some cases is associated with placental edema and polyhydramnios. This can be seen in all trimesters. It is classified as immune and nonimmune fetal hydrops. Immune hydrops fetalis-rhesus alloimmunization and other blood group antibodies cause hemolytic disease of the newborn. Nonimmune hydrops fetalis can be largely divided as fetal, maternal, placental and idiopathic. Pathophysiology, investigations, treatment and counseling are outlined.

**Keywords:** fetal hydrops, hydrops fetalis, immune hydrops, nonimmune fetal hydrops, pathophysiology
