How reliable is Basal Body Temps as a measure of Thyroid function & who here uses it?

[knackersyard]

Also, how low have your temps been???

Prior to medication, my Basal Temp (under tongue, on waking) was 35.6c (96.08 f).

I'm currently on 3 grains of Thiroyd NDT & my temp is up to 36.4c (97.52 f).

I plan to stay on 3 grains for another week, then increase dose.

I'd be interested to hear other's experiences.

[BadHare]

Repeating myself as copied from my reply to your other post:

When I did the Barnes basal body temperature test for 4 months, prior to taking THs, my morning temperature before self-medicating with NDT was 35.1 degrees celcius, most days. It was occasionally as high as 35.3. Now my normal is usually 36.1-36.3, occasionaly higher, so I assume that's my normal, 36.7 being average.

How you feel could be more important than comparitive numbers.

I started on 1/4 grain & increased every 2 weeks, knowing it would take more than a week for the T4 to convert to T3. If you've increased by a higher dose, & more frequently, it could kick in all at once. Don't want to p*ss on your chips, but perhaps slow & steady could prevent you having an issue with rT3.

[Mary-intussuception]

Mine has been as low as 34.9 .

Haven't bothered to check for a while. Last time I did - ok.

[humanbean]

When I'm going through a good phase my basal temp is around 97.4F ( 36.3C ), but can rise to the dizzy heights of 97.8F ( 36.6C ).

I don't measure it very often any more. I usually do so either out of occasional curiosity or because I think something is going wrong.

[knackersyard]

Thanks for the feedback.

I'll continue to measure daily & see if I can get to the magic 36.7

[Clairewalker751]

I'm on Levo and my morning temp is usually 35.3 I can get up to about 36 .5 later in the day

[knackersyard in reply to Clairewalker751]

It's my understanding that temps later in the day (when active) are irrelevant.

What we're talking here is Basal Body Temp. On waking, before movement.

Are you sure your Levo is working?

[Clairewalker751 in reply to knackersyard]

I don't think it's working adequately I'm looking at NDT and T3

[knackersyard in reply to Clairewalker751]

You could just switch (& you'd get plenty of good guidance on here), but if I were you I'd do a private blood test of your TSH, T4, T3 & Reverse T3

That will give you hard copy evidence of what's going on. You can then take that to your GP in future (when you're thriving on NDT) & ask for them to prescribe you.

[Clairewalker751 in reply to knackersyard]

I've had private bloods but not done the reverse T3 I'm seeing Doc tomorrow going to discuss it all with her ps love your tag name

[knackersyard in reply to Clairewalker751]

I used Blue Horizons. Really useful, because it showed that 150mcg Levo didn't increase my T3 at all (not even 0.01) & my Reverse T3 was high.

It enabled me to go to my GP & even though I don't think he knew what rT3 is, he was onboard when I said I preferred to go private (no way am I having some Endo spout BS). In a year's time, if I'm feeling brilliant & my bloods look great, I can ask him to take over my NDT supply.

Good luck!

[richar03]

Hi my bbt was routinely below 36 degrees upon waking prior to thyroid meds. Now I'm 36.4-36.6, raising and falling a little with my menstrual cycle. I monitored the bbt closely as I addend in T3 but it hasn't affected it which I think is reassuring. I also measure my blood pressure which has also stayed low throughout the adding of Levo and then T3.