The basal body temperature method is a natural contraceptive method that is based on the daily tracking of vaginal temperature. The temperature is taken with a regular thermometer, and allows you to identify variations from the base temperature during the menstrual cycle. The method is based on the fact that the basal body temperature (BBT) of a female has a slight rise (+ 0.2-0.5 ° C) 1-2 days after ovulation as a result of stimulation by the hormone progesterone.
The temperature is measured in the morning, as soon as you wake up, before carrying out any activities. You must be in a calm environment, preferably before 8.00 am. The temperature should be recorded on a specific monthly chart that is usually included with the thermometer package, and can be used to create a customized monthly chart. This method, which has medium contraceptive efficacy, is quite challenging and requires a settling-in period to learn a number of basic rules for measuring the basal temperature.
