BBT and thyroid function

[bocaburger]

What is the normal range for pre- and post-ovulation BBT?  Dr. Google is giving me a lot of different answers.

The reason I ask is that my Synthroid dose was increased at the end of last cycle, and my pre-O temps have been MUCH higher (like a full degree higher) than any of my previous charts.  I'm hoping it's a sign that my thyroid function is improving, but I'm a little nervous that maybe I've overcorrected.  My temp today was 98.44, which is higher than I normally have even post-O.  I'm also a little nervous that after O I will have a low-grade fever.

I also have had insomnia the past couple weeks (a side effect of Synthroid and another of my meds), so it's possible my temps are elevated just because I haven't been sleeping soundly.

Thanks for your help!

[penguin129]

I take 75 mcg of levythyroxine (the generic of synthroid). My Pre- O temps are in the lower 97 and upper 96 range. My Post-O temps are in the upper 97 and lower 98 range. I'm not sure if that helps at all. What level are they trying to get you at?

[joy]

There is no "normal" pre-ovulation and post-ovulation temps. You also can't tell much about your thyroid function from your basal body temps. Some old school doctors think you can, but the more I've read, the more I've realized that there isn't a strong correlation. Some people with very low basal body temps have fine thyroid function and others have bad. There just isn't a one-size-fits-all here.

Let your thyroid tests and other feelings (nervousness, rapid heartbeat, weight loss for over-active) dictate your thyroid dosage.

[bocaburger]

Jun 8, 2015 14:00:25 GMT -5 penguin129 said:

I take 75 mcg of levythyroxine (the generic of synthroid). My Pre- O temps are in the lower 97 and upper 96 range. My Post-O temps are in the upper 97 and lower 98 range. I'm not sure if that helps at all. What level are they trying to get you at?

They just switched me from 50mcg to 75mcg because they want my TSH below 2.5 and right now it's at 2.74. My temps are usually in the same range as yours, but this cycle pre-O temps have been upper 97 to mid 98.

[joy]

Also - since you just switched, your body is adjusting. That could mean all sorts of symptoms that mean really nothing other than the normal upheaval brought on by a dosage change.

[penguin129]

Also, my PCP waits 6 weeks after a dosage change to check my levels again. It takes time.

[almachs0786]

Just my experience, yours may be totally different:

When I was still adjusting my dosage of Synthroid, I always had a period during which I had the same thought as you.. I thought doc must have over corrected. I actually did have higher temps for almost 2 weeks with every increase, as well as other side effects of the medication that worked themselves out around the same time frame.

Again, it's different for everyone.. That's just how my body reacts to it. It could be something entirely different for you.

[wowcheezits]

Jun 8, 2015 14:31:04 GMT -5 penguin129 said:

Also, my PCP waits 6 weeks after a dosage change to check my levels again. It takes time.

Same here.

[mazzola23]

Yeah- if you just changed it will take some time to adjust. My pre-o temps are in the mid 97s, post-o were in the 98s. I'm odd in that my BBT is one of the highest temps of the day. I randomly take my temp during the day, and more times than not it is lower than my morning temp which doesn't seem right.