Womens Health

Basal body temperatures (BBTs) as backup to pills

Can you (reliably) take BBT temperatures while you're taking birth control pills? I'd like to do this as a back up method to my pills, but don't want to if it will alter the temps either way...

That's an interesting question I don't think I've ever had asked before. I'm not sure, but I suspect the progestin in the pill would alter the early temps to make them higher.

On the other hand, if you had a breakthrough ovulation on the pill it could well show a biphasic curve. If you took BBTs for two months and they were flat, I would quit taking them.

The failure rate of BC pills is about 1-3% overall but if there is perfect use (no pills missed) the failure rate is only about 3/1000.

It seems if you are compulsive enough to take BBT temps, it's unlikely you would miss a pill. It therefore seems to be a bit of overkill to take BBTs while taking the pill.

Table of Contents
1. Pill and bleeding issues
2. Pill withdrawal bleeding
3. Pregnant and bleeding
4. Pregnant and withdrawal bleeding
5. Missed pills and spotting
6. BBT as pill backup?
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