Science Questions

How does monitoring temperature in the 21st century differ to methods of the 80s?

Sun, 8th Nov 2009

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Barbara, Friday Bridge asked:

I was having problems conceiving in 1980. Before I got up every morning, I had to take my temperature. It was a very simple method. How does that really differ from this new technology which seems similar but a bit more complicated?


We put this to Shamus Husheer from Cambridge Temperature Concepts

Shamus -   Thatís exactly the same technique that my parents used to have me.  It was very common on the 70s and 80s.  But unfortunately, itís not highly prescribed to everyone.  The DuoFertility monitor, which weíve created, ensures primarily that you have no missed measurements which can cause the data to be uninterpretable.  And itís much more reliable because it measures up to 20,000 temperatures per night and your movement to get the sleeping temperature because when you wake up, the body changes in temperature very rapidly.

So if you change the time that you measure, you can introduce a lot of noise on that data. That means if youíre one of these women with a 0.3-degree temperature change on your cycle, you can completely lose that.  If youíre lucky enough to have a one and a half degree change in your cycle, youíre probably going to be okay.  So it comes down to the accuracy measurement in the noise and also the statistical analysis of that data, rather than waiting for three days after ovulation to determine that you have seen the rise using the old method. We can spot that within a day, which means the egg is still alive, and you still have time to conceive that cycle.


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