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The Best BBT Thermometer

If you’re trying to predict when you’re due to ovulate, you may consider measuring your Basal Body Temperature or BBT. It’s the low core temperature your body falls to when it’s resting, and the patterns it reveals can be used to show you when you’re due to ovulate and allow you to plan when you're most likely to conceive.

For the majority of people, their core temperature drops noticeably in the day before ovulation, and then raises immediately in the days afterwards by a stable and noticeable .2 of a degree Centigrade.

Even if your personal BBT is different from the average, tracking it month by month, lets you identify this change that signals ovulation. That’s one of the upsides to this method – it’s not based on an ‘off the shelf’ metric that doesn’t fit you if you don’t have the average length menstrual or hormonal cycle, it’s based specifically on what your body does in response to menstruation.

The quality of the predictions you get from your BBT is only as good as the measurements you take. It’s the mere action of waking up and reaching for a thermometer that can send your core temperature rising, and swamp those delicate changes in the minimum you need to record. OvuSense is here to take a look at what’s available and help you decide on what's best for your fertility plans.

Oral Thermometers

The majority of BBT monitors use oral thermometers and recommend keeping it by your bedside – it’s less invasive, and more convenient. Oral thermometers are amongst the most unreliable methods of measuring temperature however, and most are only capable of recording a temperature to the nearest tenth of a degree. This can result in subtle changes being missed and therefore result in an inaccurate prediction which negatively impacts your chances of conceiving.


OvuSense has addressed these issues in order to give the most accurate readings possible: our vaginal sensor records more accurate overnight readings and measures the true fluctuations of progesterone throughout your cycle. This data is automatically entered into an accompanying app which then combines the results into a prediction of when you’re due to ovulate 24 hours in advance, which is clinically proven to be correct 96% of the time, giving you the advantage you need!

Find out more about core temperature technology and fertility here