Hydrops fetalis

Hydrops fetalis
An ultrasound showing a fetus with hydrops fetalis
SpecialtyObstetrics and gynaecology, hematology, immunology 

Hydrops fetalis or hydrops foetalis is a condition in the fetus characterized by an accumulation of fluid, or edema, in at least two fetal compartments. By comparison, hydrops allantois or hydrops amnion is an accumulation of excessive fluid in the allantoic or amniotic space, respectively.