<unk><unk><unk>  imbalance is an abnormality of the human body's normal balance of<unk> s and<unk> s that causes the plasma pH to deviate out of the normal range (7.35 to 7.45). In the fetus, the normal range differs<unk> d on which umbilical vessel is sampled (umbilical vein pH is normally 7.25 to 7.45; umbilical artery pH is normally 7.18 to 7.38). It can exist in varying levels of severity, some life-threatening.
Acid–base disorder
Hypoxia 
Acidosis
Anoxia
Electrolyte imbalance
Alkaline tide
Hypercapnia
Alkalosis