Is the sympto-thermal method for contraception reliable? Also, which thermometer is appropriate?

Hello, the sympthothermal method can be used as a means of contraception. However, its effectiveness in real life is around 80%, which is lower than many other contraceptive methods. This is due to the fact that it is a method that requires one to be very alert to one's symptoms and to have a good knowledge of the menstrual cycle. Since this method relies on temperature and cervical mucus, several factors can influence it, such as infections and fever. Also, it is necessary to have a very regular cycle. Therefore, it is better to have had a little training to use it on a regular basis. I refer you to this site which explains the pros and cons: https://www.fqpn.qc.ca/?methodes=symptothermique

As for the thermometer, basal thermometers are recommended and should be able to measure a difference of 0.05 to 0.1 degrees Celcius. Indeed, the change in body temperature is sometimes minimal. Sarah-Yan Chagnon, pharmacist