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A female asked:

We use nfp & now experience irregular & basal temps. what would cause a lack of high basal temp 21 days after period, day 33 today? no period age 49

2 doctor answers2 doctors weighed in
Dr. Charles Whiting
Obstetrics and Gynecology 29 years experience
Menopause: At age 49, you may not be ovulating every month anymore as you are soon to enter menopause. If you don't ovulate, you won't get the temperature rise and you may miss your period. Ovulation tends to be somewhat sporadic at this age. Best wishes!
Created for people with ongoing healthcare needs but benefits everyone.
Dr. Peter Baumann
Specializes in Obstetrics and Gynecology
Anovulation: Women approaching menopause don't ovulate on a regular basis any more. Consequently, when there is no ovulation there is not enough progesterone, which is responsible for an increase in basal body temperature.
Created for people with ongoing healthcare needs but benefits everyone.
Last updated Apr 19, 2015

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