Quick questions: BBT and First Response tests

[IknowIknowIknowImJustChecking]

Posting here for traffic.

1. Is basal body temp stable for life, or could I for example now have a different BBT than a few years ago / since having DC?

2. I know what the official guidelines for reliability of FR tests are, but as basically a completely pointless request, can anyone share experiences of testing early?

Thanks

I'm no expert but I'd be surprised if basal temperatures were stable for life, doesn't menopause change your body temperature significantly?

Good point! Definitely not menopausal or peri, though. Difference would be five years.

I'm not really the person to ask, given my basal behaves like a three year old having eaten a year's worth of sugar :D Didn't want you sitting here alone though!

Thank you! Love the analogy. Mine was always very consistent when TTC but if I check it on the mornings this week I’ve no idea whether it should expect to be the same. So much gets warped by having kids!

No, they wouldn’t necessarily be stable in that way. Assuming your cycle is otherwise normal, you should see a stable pattern over the course of a month (the expected rise, etc) and you should be able to see what is happening month to month, but on a chart. The actual numbers can be different even while the pattern is the same.

It’s quite normal for the to vary seasonally (depending on how hot or cold you are), and I’m sure there are lots of factors that could affect them (illness, for example). So it’s not like if you get to 36.4 every month you know you’ve ovulated, if you see what I mean. It’s only the pattern that really matters.