>Basal body temperature is your temperature at rest when you wake up in the morning. This temperature rises slightly around the time of ovulation. Keeping track of this temperature and other changes such as cervical mucus may help you figure out when you are ovulating. Take your temperature before you get out of bed every morning. Since the change during ovulation is only about 1/2 degree F (1/3 degree C), you should use a sensitive thermometer such as a basal body thermometer.