Frequently Asked Questions
How does the Clear & Simple ovulation test work?
The Clear & Simple ovulation test works by detecting the monthly surge in a key fertility hormone (Luteinising hormone or LH). This hormone is produced 1 to 2 days prior to ovulation so tells you when you are at your most fertile.
What if I don't know my cycle length or if my periods are irregular?
If you don’t know your cycle length you are advised to wait for at least one menstrual cycle and note the length of the cycle before using this test. If you want to start without knowing your cycle length you may begin the test 11 days after the first day of your period as the average cycle length is 28 days. Perform 1 test at approximately the same time each day over a 5 day period or until the LH surge has been detected. If your cycle length is irregular and varies by more than 3 days then use the shortest cycle length you have had over the last 6 months to calculate when to test. In both cases it is possible that you either miss your LH surge because you started testing too late or you may need to buy another pack to continue testing after the 5 days because your LH surge was later.
What do I do if my test is invalid?
If no lines appear within 10 minutes or if only a test line appears, this is usually due to the strip not being wet enough. Repeat the test ensuring that the strip is immersed in the urine sample for the full 10 seconds.
What do I do if my test is positive (LH Surge)?
A positive test result (as in diagram A or B) shows that the LH surge has been detected. Your 2 most fertile days are today and tomorrow so if you have sex in the next 48 hours you will maximise your chance of getting pregnant.
What do I do if my test is negative (No LH surge)?
If your result looks like diagram C or D, retest at the same time each day until you detect your LH surge. If your cycle length varies by more than 3 days, it is possible that you will need to start a new pack to detect your LH surge. Some women do not ovulate each cycle and will not have a LH Surge. If you are concerned about your results talk to your doctor.
Do I need to use all the tests?
No, you can stop testing once you have detected your LH surge.
Can any medication or medical conditions affect the result?
Testing too soon after using fertility drugs that contain HCG (Human Chorionic Gonadotropin) or LH can give misleading results.
If you have recently stopped taking hormonal contraception or are using fertility treatments such as clomiphene citrate, your periods may be irregular leading you to start testing on the wrong day. In this case you may need to use another pack of tests to detect your LH surge.
If you are pregnant or have recently been pregnant (even if not carried to full term) you may get misleading results.
Ectopic pregnancy, ovarian cysts, menopause and some very rare medical conditions may give misleading results.
If you get unexpected results you should talk about them with your doctor.
I have used the ovulation tests for several months and I’m still not pregnant, what can I do?
There are several reasons why you have not become pregnant even though you have been having sex at your most fertile time. In some cases, it can take many months to become pregnant but if you have tried for several months without success you should talk to your doctor.
Who can I contact for further information?
You may wish to discuss your results with your doctor or call our helpline on: UK 0333 320 2072
Advisors available Mon – Fri 9-5
Call charges vary, please check with your provider. Please be ready to quote the LOT number.