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When is your Fertile Window?

Getting pregnant can be a challenge. More people than you might expect wait longer than they’d like for that positive result on the pregnancy test, but fortunately there are some simple steps you can take to boost your chances and give yourself a better chance of getting pregnant when you want to.

The most important thing you can do is make sure you are trying to conceive at the time when you have the best chance of success: during your fertile window. This term describes the span of days in your cycle when the lifespan of both sperm and eggs can overlap with each other: when sperm can survive long enough after being ejaculated to have a chance of encountering and fertilising the egg that’s released in ovulation. If you’re not trying to identify when your fertile days fall, and trying to focus on those days in your attempts to conceive, then you’re not giving yourself the best chance to get pregnant!

To find out when your fertile window falls, you need to accurately predict when you are next going to ovulate. There are several different methods available, each with advantages and disadvantages. OPKs, or ovulation predictor kits, are widely available and easy to use, relatively speaking. They test your urine for the hormones that drive ovulation and report a positive result when they detect the surge of Luteinising Hormone that causes a mature egg to be released from the ovaries.

Unfortunately, if your hormone levels don’t match the baseline that these tests are configured for, you don’t get useful answers from them. If you have a naturally high surge in LH, or a particularly low one, the test can’t accurately tell you whether you’re ovulating or not.

OvuSense gets a more accurate measure of your fertility by using your Basal Body Temperature. This is the low level your core temperature falls to during an extended period of rest. Measuring it can be tricky, but our system uses a specialised sensor to check your temperature right through the night to get the most accurate answer possible, and it processes that data into a prediction of when you’ll next ovulate with a cloud-based algorithm.

Your fertile window isn’t just the day you ovulate and the 24 hours that the egg will survive for. You need to count back to include the lifespan of sperm. As sperm can survive as long as five days, your fertile window is the six days surrounding the day you ovulate, and it’s in these days that you stand the best chance to conceive naturally.

To learn more about your cycle and hear from Ovusense customers visit ovusense