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How to Calculate Ovulation Period

When you’re trying to conceive, there’s no more important thing to be aware of than when you’re going to ovulate. Ovulation is the key event of the menstrual cycle, when an egg is ejected from the ovaries. That egg remains fertile for up to twenty-four hours, so it’s important to know when it’s released so you can time your attempts to conceive to ensure sperm have the best chance of meeting it.

There are various methods you can bring to bear to help you calculate your ovulation period – the time you’re likely to ovulate. The best way to feel confident about when you’re going to ovulate is to use more than one of these methods, combining the results of several tests to ensure you’ve covered all the angles.

Working with the Calendar

The first, simplest and least invasive thing you can do is simply track your cycle on the calendar. If you note the date of the first day of your period (that’s the first day of full bleeding, rather than simply spotting), then over the course of several months you can pin down the length of cycle. On average, a cycle is 28 days long, but it can vary from 21 days to 35 days long. For some women, their cycle is very regular, and if it was 29 days long last month it will be 29 days long the following one, and any variation from that is evidence of a change in your body you may want to investigate.

Other women have more variable cycles – this can be entirely natural, the result of side effects of medication, stress, or health issues, most frequently Polycystic Ovary Syndrome, or PCOS.

If you have a very regular cycle, you can simply be guided by the fact that ovulation usually occurs 14 days before your period begins. Once you know how long your cycle is, you can mark this on the calendar ahead of time and focus your attempts to conceive on this date.

Hormone Tests

Ovulation is driven by hormonal changes in the body, and you can help pin down the exact date of when you ovulate with tests that measure those hormones.

OPKs generally test your urine for the surge of Luteinising Hormone that drives ovulation, though some variations use your saliva. You can test your saliva yourself, in fact, by letting it dry and examining it for a ‘ferning’ pattern, like frost on a window, which indicates the presence of ovulation hormones.

These hormone tests are convenient, but not always useful – if you have naturally high or low levels of the Luteinising Hormone then they might not be able to return an accurate result, and become close to useless if you have a hormone-disrupting condition like PCOS or Hyperthyroidism.

Basal Body Temperature

Your Basal Body Temperature offers a way to calculate your ovulation period that’s not reliant on hormones, so it’s especially useful to people with PCOS.

OvuSense makes it easier to access your BBT. Our system uses a specialised sensor that takes your temperature right through the night for an accurate read on your Basal Body Temperature, and a linked app to track the results and process them into a prediction that will help you get pregnant!

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