The Battle of Normandy was fought during World War II in the summer of 1944, between the Allied nations and German forces occupying Western Europe.
serum tsh is usually regarded as a marker of thyroid function on the basis of a simple feedback model tsh is released from the anterior pituitary gland in response to thyroid releasing hormone from the hypothalamus and causes the synthesis and secretion of thyroxine t4 and triiodothyronine t3 by the thyroid gland
If the TSH level is normal or low and serum free T 4 levels are low, this is suggestive of central hypothyroidism (not enough TSH or TRH secretion by the pituitary gland or hypothalamus). There may be other features of hypopituitarism, such as menstrual cycle abnormalities and adrenal insufficiency.