TRH - Thyroid releasing hormone (TRH) crosses the placenta while TSH does not. TBG - Thyroxine binding globulin (TBG), a glycoprotein that carries T3 and T4, is elevated during pregnancy because ...
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Can You Have Hypothyroidism With Normal TSH Levels?Similar interactions can occur with the hypothalamus, which sits near the pituitary gland and affects thyrotropin-releasing hormone (TRH) production. TSH isn't actually a thyroid hormone.
Levels of thyroid hormones in serum are tightly regulated by the hypothalamic-pituitary-thyroid axis (Figure 1). Hypothalamic TSH-releasing hormone (TRH) is secreted mainly from the ...
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