OvuSense logo

Do Ovulation Calculators Work?

The most important event in your life when you’re trying to get pregnant is ovulation. Identifying when you ovulate is vital if you’re going to conceive, as it’s ovulation that anchors your fertile window: the time in your menstrual cycle when you can get pregnant. It’s only in the five or six days around your ovulation that you can conceive successfully so you need to know when it happens to give yourself the best chance of getting pregnant when you want to.

There are lots of ways to track and identify when you ovulate, to make conception easier, but some are more effective than others. Whatever option (or options) you choose, you’ll be making a compromise between convenience and accuracy, as the more stringent tests and predictions tend to require more work on your part.

OvuSense is assessing Ovulation Calculators to see where they fall on this spectrum and help you decide if they’re worth your time.

What is an Ovulation Calculator?

An ovulation calculator is one of the most convenient ways to predict when you’re going to ovulate. It doesn’t require you to keep records or take tests: plenty are available online or in app form, so you don’t even need to put pen to paper!

All you need for an ovulation calculator to work is two pieces of information: the date your last period started and the length of your cycle. From this, the calculator uses an assumption of the average menstrual cycle to work out when you’re likely to ovulate and gives you an estimation of your fertile window.

Do They Work?

There are quite a few drawbacks to the ovulation calculator, and you may have spotted them in the paragraph above, indicated by words like “assumption”, “average” and “estimation”.

Ovulation calculators don’t measure the specifics of your body, they work according to the average menstrual cycle. They work well for people whose cycles work like clockwork each month, but if yours is irregular for any reason (which could be caused by stress, by medication for an unrelated condition or by health conditions like Polycystic Ovary Syndrome), they lose all their predictive power.

If you’re lucky enough to have a clear, regular cycle, then an online ovulation predictor could be all you need to help you pinpoint your attempts to conceive. If you have any reason to think your cycle could vary by as little as a day or two from the statistical average, you’re going to need to dig a little deeper for an accurate result. OvuSense measures your basal body temperature all night, every night to make sure it’s able to give you a notification that’s specific to you 24 hours in advance of when you ovulate, which gives you the best chance to conceive!

Find out more about core temperature technology and fertility here