How many hours of sleep is required to get an accurate BBT reading. Also, if your sleep is interrupted, (ie get up to give the baby a bottle at 3 am after having had 5 hours of sleep, then going back to bed for3 more hours.) Upon waking, taking your BBT, would this be an accurate reading given the interruption @ 3am? Also, does lacation effect the accuracy? One more Q. Does lack of a good nights sleep (hour wise, not interruption wise) make the BBT increase or decrease? ie Inormally get 7 hours, but if I stay up late and only get 4 or 5, would that cause and increase or decrease in the temp?
Thanks so much, your answers are so helpful to us all.
Cathy- Any change in sleep pattern can change the temperature. Just make a notation to the effect that you were up late, were ill, etc. The temperature rise should normally be 0.3 to 1.0 degree with ovulation and should be maintained. Lactation can affect BBT because you may not have resumed ovulation after childbirth because of the breastfeeding.
Fertility Awareness by McCarthy and Martin (1977) seems to be a good resource
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