1.The dead calices of flowers scattered on the ground like stars;

花朵谢落在地面上，宛如点点星星；

2.Ultrasonography — This will reveal the degree of dilatation of the renal pelvis and calices and allows for diagnosis of hydronephrosis in the prenatal period.

超声显像：它可展示肾盂及肾盏的扩大程度，及可在胎儿期诊断肾积水。