The basal body temperature method is a type of natural family planning, also called fertility awareness-based methods.

Your basal body temperature is your temperature when you're fully at rest. Ovulation may cause a slight increase in basal body temperature. You'll be most fertile during the two to three days before your temperature rises. By tracking your basal body temperature each day, you may be able to predict when you'll ovulate. In turn, this may help you determine when you're most likely to conceive.

If you're hoping to get pregnant, you can use the basal body temperature method to determine the best days to have sex. Similarly, if you're hoping to avoid pregnancy, you can use the basal body temperature method to determine which days to avoid unprotected sex.

Nov. 18, 2011