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What Does BBT Mean?

If you’re trying to get pregnant, you might feel like you’re being bombarded by obscure terminology: the names of different hormones, analysis of your menstrual cycle in more detail than you thought you’d ever want, and different medications, tools and techniques to help boost your fertility.

One of the terms that you’re going to be hearing is BBT, an important tool that can be used to help boost your chances of conceiving.

OvuSense is here to explain just what BBT means, and help you to determine whr.

What’s It Short For?

The three letters BBT aren’t a very good guide for telling you what this term means. It’s an abbreviation of Basal Body Temperature, which is more accessible. This is clearly related to your body temperature, but when is your body temperature ‘basal’ and how do you check it?


Basal has several different definitions, but we’re interested in the scientific one: the minimal or basic requirement for an organism. Your basal diet is the smallest allotment of calories that your body needs to keep functioning. Your basal temperature is the basic temperature your body returns to you when you’re completely at rest.

Why is it Important?

BBT monitoring devices are used by many couples to try and boost their chances of conceiving. The patterns revealed by changes in your basal body temperature give you the cue you need to try to get pregnant at the right time to boost your chances of success.

Your BBT fluctuates in response to your ovulation cycle, dipping the day before the event, and then rising by around 0.2 degrees for the three days after you ovulate. Mapping this pattern allows you to use past data to predict your cycle in the future.

Drawbacks of BBT

Any physical activity causes your body temperature to rise by an appreciable amount: you don’t have to be in the middle of a workout to have an effect on your baseline temperature. simply waking up and getting out of bed in the morning begins this process: adding noise that makes it harder to identify the signal telling you when you should be trying to conceive.

Unlike BBT monitoring which uses oral thermometers, OvuSense avoids this problem by using a vaginal sensor that measures your true fluctuations of progesterone throughout your cycle. This method ensures you get the most accurate readings and then processes them for you using an app to give a notification of when you’re fertile that’s clinically proven to be correct 96% of the time!

Find out more about core temperature technology and fertility here