Hydrops fetalis 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 are an accumulation of excessive fluid in the allantoic or amniotic space respectively.In this case though there is caudal regression sequence (CRS) with the following urethral agenesis and genital agensis and anal imperforation!