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Answer
Basal Body Temperatures (BBTs) are simple and sometimes helpful in
evaluating when and if a woman ovulates. If there is a clear temperature
elevation midcycle that remains elevated for 12 - 14 days, this is a fairly
good indicator that the woman ovulated that cycle slightly before the
temperature went up. The temperature rises due to an effect of progestrone
which is produced with ovulation. The temperature will stay elevated beyond
14 days if a woman is pregnant.
For many women who ovulate, however, BBTs are not very clear, and may
be confusing. Urine LH predictor kits may be better at predicting ahead
of time when you will ovulate, with a color change occurring in the
test kit 12 - 24 hours before ovulation. This will allow you to time
sexual intercourse with ovulation, whereas with BBTs when the
temperature goes up it may already be too late (post ovulation).
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