Home > Infertility Help > Fertility Charting & Tests > How Ovulation Predictor Kits Work – Predict When You’re Ovulating

How Ovulation Predictor Kits Work – Predict When You’re Ovulating

Ovulation predictor kits predict when you’re ovulating and help you chart your fertility levels. Basically, they predict when the egg is ready for the sperm – and they help you get pregnant.

One of the most popular ovulation predictor kits the Clearblue Easy Fertility Monitor Test Sticks.

But remember that you’ll get what you wish for! Check this out:

“By far the most common craving of pregnant women is not to be pregnant,” said Phyllis Diller.

And the most common craving of couples coping with infertility is to be pregnant! The grass is always greener on the other side, isn’t it?

Here’s how to use an ovulation predictor kit, plus info on how to get one without leaving home…

How Kits Predict When You’re Ovulating

Ovulation predictor kits work by detecting a surge or increase in the Luteinizing Hormone (LH) in your urine. This LH surge occurs before your ovaries release an egg (ovulation). You’re at your most fertile the day before and the day after your LH surge.

Simply put, ovulation predictor kits detect an ovulation surge – which increases your chances of getting pregnant because it predicts almost exactly when your egg will slide down the chute! The LH surge occurs about 12-36 hours before ovulation. When your ovulation test is positive, you want to make sure there’s sperm up where it belongs.

Not All Ovulation Predictor Kits Are Created Equal

Remember, not all ovulation predictor tests work for all women! I tried the First Response Easy-Read One-Step Ovulation Predictor Test, and it gave me “false positives” – which means I thought I was ovulating when I just had raging hormones. My fertility doctor said I just need to try another predictor kit, and recommended the Clearblue ovulation test strips (pictured above).

Also, remember that conditions such as endometriosis, fibroids, or polycystic ovary syndrome may interfere with your prediction test.

The only way to know what ovulation predictor kit works for you is to experiment. I suggest trying the most popular ones, which may be the most effective – and don’t be afraid to ask your doctor which brand he or she recommends.

How to Use an Ovulation Predictor Kit

Each ovulation predictor kit is slightly different – so be sure to read the directions! Generally, they’re similar to pregnancy tests: you pee on the end of the ovulation stick, wait for five minutes, and check to see if there are two blue strips. If the test is positive, you either are already ovulating or will be ovulating shortly…so it’s time to grab some sperm!

If the test is negative, you need to do it again the next day. This is a drag, as each ovulation test strip costs money (ranging from about $5 to $10 every time – depending on the type of ovulation predictor kit you use). If you’re worried about money, read 11 Tips for Saving Money for Fertility Costs.

The newer digital ovulation predictor kits may be easier to read – but they are a little more expensive.

If you’re worried about infertility, read How Do You Get Pregnant When You Can’t Afford Fertility Treatments?

Are you trying to get pregnant? Fairhaven Health's Hormone Balance Bundle improves egg quality, encourages cycle regularity, and helps your body ovulate regularly.

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3 thoughts on “How Ovulation Predictor Kits Work – Predict When You’re Ovulating”

  1. Laurie Pawlik-Kienlen


    Thanks for your tip on this ovulation predictor kit — I think the saliva-testing method would be much easier and nicer than peeing on a stick!

    Good luck…I hope you’re already pregnant. 🙂


  2. I agree to go with the OPK. But I use a different one than you do. I use a saliva based testing kit called Ovu-Trac (www.ovu-trac.com). It predicts when you are fertile by the hormonal changes in your saliva, not your temperature. So it’s individual to me. I’ve been using it for 2 months now, and feeling hopeful. What else can you do? You gotta have hope!!