Your basal body temperature is your body temperature immediately upon rising in the morning.

One use of basal body temperature is a woman can tell if she has ovulated based on recording this temperature over time. Before a women ovulates, her basal body temperature is lower. Once she ovulates and her levels of progesterone rise, so does her basal body temperature.

There are special thermometers to measure BBT, but you can also just use a regular thermometer.

Basal Metabolic Temperature or sometimes BBT (Basal Body Temperature).

what are health teaching about basal body temperature method of contraception?

BMT also called Basal Metabolic Temperature or sometimes BBT (Basal Body Temperature).

If you are trying to get pregnant, the best way of estimating your most fertile days is by taking your basal body temperature. Your basal body temperature is your body's resting temperature when you wake up in the morning. You will need to purchase a basal body temperature thermometer, which are available from most drug stores.