What is BBT?

Basal body temperature (BBT) is the lowest body temperature in a 24-hour period.

How to measure BBT?

BBT thermometers are available at most drugstores and the best time to take measurements using a BBT Thermometer is exactly after you wake up - as the first thing in the morning. It is highly recommended that you should not even get out of bed or start the day, but instead pop a basal body thermometer for temperature measurements. Another important criteria is to take these reading at almost the same time through the days of the cycle.

Why BBT should be tracked?

In women, ovulation causes an increase of one-half to one degree Fahrenheit in BBT; monitoring of BBT is one way of tracking fertility. There is a tendency of a woman’s body to have lower temperatures before ovulation, and higher temperatures afterwards.