NORMAL!!: T4 should be between 12-15 in pregnancy! do not let anyone treat that! HCG stimulates thyroid to increase production since thyroid is most important hormone in early pregnancy for fetus. After 13 w baby makes own thyroid. The best indicator of healthy thyroid level in pregnancy is t4. 12-15 and TSH < 2.5.
Answered 3/11/2016
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