Below you will find brief information for null. This guide provides information about Basal Body Temperature (BBT) and the use of thermometers for tracking it. It explains that BBT is your waking temperature and is used to confirm ovulation, not predict it. The guide also includes the criteria for a good BBT thermometer and best practices for using it, including that it's best to take BBT first thing in the morning. Additionally document provides some information about most popular thermometers.