Lee - you measure thyroid function in two ways: the actual levels of thyroid hormone circulating in the blood (T4) and the level of messenger being sent from the brain to the thyroid gland (thyroid stimulating hormone - TSH). The TSH goes the opposite direction of the T4 - when thyroid levels drop, the brain sends more and more TSH to the thyroid, trying to tell it to crank up production. When thyroid levels rise, the brain backs off and sends lee TSH. TSH is actually a more sensitive measure of thyroid status. "normal" range for TSH is 0.5 - 4.0, but many studies have shown that for most people, the "optimum" range is a TSH between 1.0 and 2.0 . Women having trouble conceiving because of hypothyroidism, for instance, are much more likely to conceive with a TSH of 1.5 than one of 3.5 - even though both are in the "normal" range.
Just concentrate on making her feel loved for now.
