Has anyone ever heard of this before?

Question

I read this morning that if you check your bbt at a different time than usual, you're supposed to add .1 degree for every half hour earlier you woke up. In a similar sense, if you wake up later you subtract .1 for every half hour late. 
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​I ask because the past 2 days I woke up at 8am to do bbt and I was at 98.2 & 98. Today, at 5am to go to work I was at 97. Thinking I was out of the game this month (I'm at 13 dpo and my cover line is 96.8) - realistically if I used this logic my bbt would be 97.6 today. I know confusing :-/
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​Anyone ever hear of this logic?!

Answer

Does anyone use the BBT adjuster online?
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​I'm not a consistent sleeper so I struggle with same time each day as I wake early sometimes

Answer

Why not just set your alarm to wake you at a certain time and just test and gal back asleep 
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​When I work I'm up at 5am but when I'm off I'm up at 9am. So I just set my alarm to wake me at 5am all the time. Keep my thermometer at my bed side and take my temp rhen go back to sleep takes but 1-2 minutes.

Answer

When I test earlier in the night it is lower, which is the opposite of what you've suggested above, but its very consistent for me.

Answer

Here are 2 sites that I found via Google. A lot comes up on forums too if you Google it. But I know how the Internet isn't always the best resource :)
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​ http://www.ovatel.com/using-the-bbt-method-with-ovatel-%E2%80%93-the-confirmation/
 
http://www.fertilinet.com/BBT.htm

Answer

No. Can you tell us the source please?

Has anyone ever heard of this before?

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