How to use the Basal Thermometer for Ovulation? By tracking your temperature, you’ll gain insight into your monthly cycle. Your temperature will tell you when you have ovulated. This will help you to determine when your fertile window occurs. During this time, you have the highest chance of getting pregnant. Make sure to write down your temperature each morning in a graph or in a fertility app. Things to keep in mind when tracking your waking temperature with the Ovulation Thermometer: 1) Measure your temperature with the Fertility Thermometer as soon as you wake up. 2) Try to make sure you measure your temperature with the Digital Thermometer around the same time each day. 3) Avoid moving around or getting up before taking your temperature with the Oral Thermometer. 4) Use the BBT Thermometer for Ovulation after you’ve had at least 4 consecutive hours of sleep. 5) Your waking temperature can be influenced by things such as fever, alcohol, and traveling. The best of the Basal Body Temperature Thermometer: 1) The Digital Basal Thermometer shows your temperature with an accuracy of 0.01 degree. 2) The Oral Digital Thermometer is equipped with an extra soft beep, so you don’t wake up your partner while taking your temp. 3) The tip of the Temperature Thermometer is waterproof, so it’s easy to keep it clean and hygienic with soapy water or a soft cloth. 4) The Basal Thermometers remembers your last taken temperature. Just in case you forget to write it down, the BBT Thermometer stores it for you.