Basal Body Temperature Method
Updated:The Basal Body Temperature (BBT) method is a natural family planning technique used to track fertility cycles. It involves measuring and recording a woman's body temperature first thing in the morning, before any physical activity. This temperature, known as the basal body temperature, typically rises slightly (0.5-1°F or 0.3-0.6°C) after ovulation due to increased progesterone levels.
Additional Information
The BBT method can be used both for contraception and to increase the chances of conception. When used for contraception, couples avoid unprotected sex during the fertile period, which starts a few days before ovulation and ends after the temperature has been elevated for three days. For conception, couples aim to have intercourse during the fertile period.
It's important to note that the BBT method:
- Requires consistent daily temperature measurements
- Is most effective when combined with other fertility awareness methods
- Does not protect against sexually transmitted infections
- May be less reliable for women with irregular cycles or certain health conditions
Examples
Sarah uses the BBT method to track her ovulation. She takes her temperature every morning before getting out of bed and records it on a chart.
John and Maria are trying to conceive. They use the BBT method along with tracking cervical mucus to identify Maria's most fertile days.