the hypothalmic content of thyrotropin-releasing hormone ( trh ) , the pituitary concentration of thyroid-stimulating hormone ( tsh ) , and the serum concentrations of tsh , thyroxine ( t4 ) , and triiodothyronine ( t3 ) have been determined at different intervals during the first 50 days following birth in the rat .
C0040162
thyrotropin-releasing hormone
C0032002
pituitary