Hi y'all - I'm new here as of day before yesterday. Anyways, I read a bunch of this stuff and most is over my head, but this is some info I read that made things a little more clear at least in understanding the thyroid test. So, I thought I'd share....I just cut & pasted - there's much more info on link
http://www.ovarian-cysts-pcos.com/ne...hyroidism.html
How Is Hypothyroidism Diagnosed?
Thyroid disease is diagnosed by your symptoms, an exam and lab tests.
As thyroid hormone production drops, TSH usually increases. Therefore a higher than normal TSH level indicates a hypothyroid condition.
Unfortunately, TSH doesn’t always respond correctly to low thyroid hormone levels. If symptoms persist, and the TSH is in the normal range, the thyroid hormones (T4 and T3) should also be checked. In some cases, a diagnosis of hypothyroidism can be missed if TSH is the only hormone that is measured.
There is a growing awareness in the medical community that the current reference range for determining what is a "normal" TSH is too wide. Based on new data, the American Association of Clinical Endocrinologists recommends that the normal reference range for the TSH blood test be reduced by nearly half, down to 0.50-2.50 from the current 0.50-5.00. Other sources suggest the new upper range should be 3.33. (The higher the number, the more hypothyroid you are.) Until all physicians and labs can agree on a new range for TSH, many women will continue to be frustrated by inaccurate diagnosis.
Newbie sharing hypothyroid pcos info 
