下列何者不是正常懷孕婦女的腎臟生理變化?
腎臟尺寸變小(decreased renal size)
腎絲球過濾率上升(increased GFR)
腎盂擴大(dilatation of renal pelvis and calyces)
血漿滲透壓下降(decreased serum osmolarity)