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Best Basal Thermometer

Tracking your basal body temperature can be a good way to find out when your ovulating, and that can be important information when you’re trying to get pregnant. From when you ovulate, the egg is viable for up to twenty four hours, and if sperm can reach it in this time, they can fertilise it and you can get pregnant! If you don’t know when you’re ovulating, you could miss this important opportunity to get pregnant.

BBT tracking is quite a technical, manual way to track your fertility - at least when compared with ovulating predictor kits, which test your urine and tell you whether or not you are ovulating there and then. You need to take your temperature every morning, as soon as you wake up and before you start to move: what you need is the low temperature your body drops to overnight. This is the basal level, where changes can tell you whether your body is getting ready to ovulate. If you leave it too long, or start to get active your metabolism increases and your temperature rises away from this basic level.

When you have your temperature reading, you need to record it so you can see how it changes over time. You’re looking for a consistent rise of around .4 of a degree. If this is sustained over a 48 hour period, it’s a clear indicator of ovulation. You may want to plot your temperature readings on a graph, so you can visually see the results and look for a pattern.

Picking a Thermometer

Your BBT thermometer needs two key qualities: it needs to be accurate to the level required and it needs to be clear. A traditional mercury thermometer, where the substance inside rises to mark a place on a scale can be hard to interpret especially with the small changes of temperature we’re looking at. A colour changing thermometer is only useful to show if your temperature is within a certain range, and doesn’t give us the detail we need. A digital thermometer provides you with an unambiguous readout so human error interpreting the results can’t interfere with your charting!

You need a thermometer that’s accurate to tenths of a degree Celsius: this is the scale that shows the patterns you need. If you choose a thermometer that’s only accurate to whole degrees, you will miss the subtle rise in temperature that tells you you’re ovulating and if you choose one that promises accuracy to hundredths of a degree, you’re paying for sensitivity you don’t need.

OvuSense’s Solution

Ovusense uses a different method to track your fertility. Our temperature sensors tracks minute variations in your core temperature overnight and maps them to changes in your progesterone level. This is interpreted by our clinically tested algorithm, which can use your progesterone to predict when you’re going to ovulate well in advance, rather than only a day or two. This gives you access to your full fertile window, and an increased chance of conception!