TT4 - Total thyroxine (TT4), or L-thyroxine, increases early in pregnancy. T4 is the thyroid hormone containing 4 atoms of iodine per molecule. Normal serum level in nonpregnant adult is 5-12 mcg/dL.

You know that certain things are passed along through genes, such as personality traits, abilities or eye color. But what ...

Water and sodium retention during severe hypothyroidism create a state of volume depletion, low extracellular fluid osmolality and increased water retention. The hypothyroid population is ...