http://www.sanctuarywellness.com.au/diagnostic_tests/thyroid_test.html This is the site I used to copy the list of thyroid tests to take to my GP about 4-5 weeks ago (in order to follow up my 4 months of hoarse voice). I had been to him a few weeks previously about the hoarse throat, thinking it might originally have been mould or damp in my bedroom (still) - those members who've read many of my posts will remember I bought a new bed 5 months ago. I also bought a new wool underlay, new curtains & more recently a new goose down doona, large panel heaters & so on - that was the last of my long service leave & termination payout when I quit my job. He was keen to send me straight to a throat specialist (which makes sense), but I was keen to investigate this thyroid disfunction theory of mine (which we followed up in 2006 with negative results). And every time he tested my TSH, along with other blood tests on a regular basis, of course it was normal. He missed ordering the iodine test (on this list I took to him off the internet), which this other Dr is now following up. I also was interested in http://thyroid.about.com/cs/hypothyroidism/a/normaltsh.htm Ensure you read the bit under the question - Have you been tested for thyroid antibodies? My recent reading about thyroid suggests that you can have all the symptoms for months/years before it actually shows up on your TSH tests. T3 & T4 can also be normal. You can go from being hyperthyroid to hypothyroid (& back again). I think it's important to keep prodding the Dr's if you have the low basal temperature & all the symptoms. I know from the past 15 years that if you genuinely have symptoms that affect your daily routine & ability to function normally (whateveer normal is for you - we're all different), then keep searching for answers. (the only trouble is that some of these tests aren't covered under Medicare, so I've got to pay for them out of pocket. I've just paid the $50 for one of the thyroid tests from a few weeks ago and I know there is $68 to pay in future for one of the tests the Dr/Naturapathic ordered last week. Fortunately, she bulkbilled her 1 hour appointment direct to Medicare. Hope this bulk billing direct to Medicare continues, as now that I'm not working & on a pension, I really don't have a lot of money). Appointment to get the results is not for another week yet.