Our tests are sensitive to 40mIU/ml LH and should show a Surge/Peak at this level and above. They can both also show a Surge at levels as low as 22mIU/ml LH and this will depend on batch variation and the previous tests done in that cycle. 

This usually causes an error symbol (the BOOK and the TEST STICK/Error B) but if the Holder gave you a result then you can rely on it. We'd be happy to chat if you'd like to talk through your questions. Feel free to call us at 1-800-321-3279 and

We're sorry this happened, Gemms. We know this is an important time in your life and would like to learn more so we can help. Please call us at 1-800-321-3279 and mention reference 1874697A. Please have your purchase receipt, test and packaging

Hi Audrey. No need to worry, you can rely on this result and should now stop testing for this cycle as you have found the information you were looking for.  The smiley face will stay for 48 hours - this is your most fertile time so have interco

Peak Fertility is designed to remain constantly on the screen for 48 hours. Have intercourse at any time during this time to maximize your chance of getting pregnant.  Stop testing for this cycle once Peak Fertility has been detected. 

Hi Nikhil - Yes, you can use a Holder in more than one cycle. Just be sure not to change Holders during a cycle of use as the Holder works by gathering information across your cycle.1878142A

We're sorry this happened, Neil. Your result is not what we expect to see and can't be relied on. You should disregard this result and test again. We know this is an important time in your life and would like to learn more so we can help. Please

Hi Kimberly. Thanks for getting in touch.  No, the test strips can only be used with the type of Holder they are intended for. We'd be happy to chat if you'd like to talk through your questions.  Feel free to call us at 1-800-321-3279 a

Hi Mary. Were you seeing a blinking smiley face (High Fertility) or a non-blinking smiley face that stays on the screen for 48 hours (Peak Fertility)?  If you were seeing High Fertility, you should continue testing with the old Holder but use t

Yes, you'll need to buy another pack the same as the first pack you bought.

Both the test sticks and the Holder have an expiry date printed on them. If you need new test sticks, then you'll get a new Holder included in the pack anyway so use the new Holder. Good luck!

The best way to know for sure is to take a home pregnancy test. You can test with Clearblue as early as 5 days before your missed period, which is 4 days before you expect your period to start.  If your result is ‘Pregnant,’ you should see

The number of High Fertility days displayed each cycle is personal to you and may be more or less than 2. It’s normal for some women to see more than 2 High Fertility days in all or some of their cycles. High Fertility will be displayed when an

Hi Hannah. Stop testing when you find the Surge as you have found the information you were looking for.  It does not matter how long your Surge lasts or if you can detect it over the next few days.  The day you first see the Surge and the

We know this is an important time in your life and would like to learn more so we can help. Please call us at 1-800-321-3279. Please have your test and packaging handy. We're open Monday through Friday from 8:30am-5:00pm ET and will be glad to a

Sorry no you can't as the test sticks are different for the different products.