When the ovary is getting ready to release an egg, Luteinizing Hormone (LH) levels increase. First Vue Ovulation Tests monitor these levels to predict when your most fertile days of the month occur, thereby increasing your chances of getting pregnant if you have sex.
You can test at any time of the day but you should test at about the same time each day. Avoid too much fluid intake for 2 hours before testing. You will need to know your usual cycle length before you start to ensure that you test at the right time. Count the day your period starts as day 1 and count through to the day before your next period starts – the number of days is your cycle length. Once you know your cycle length, use the table at the bottom of the page to find out which day of your cycle to start testing. If your cycle is less than 21 days or more than 38 days ask your doctor for advice on when to test.
–Collect a Urine sample in a clean dry container.
–Open the sealed pouch and remove the strip.
–Put the test strip vertically into the urine sample making sure that the arrows are pointing down. Do not allow the urine level to go above the max line marked on the strip.
–Leave the test strip in the urine sample for 10 seconds.
–Take the strip out and lay it flat. For the first few seconds after wetting you should see the liquid moving up the test area causing it to go light pink. As the pink fades the control line will appear as a strong line and the result line will if present appear below this. Read the results within 10 minutes of doing the test.
Perform 1 test at approximately the same time each day over a 5-day period or until the LH surge has been detected.
Positive Result
(LH surge detected) If two coloured lines appear on the test strip, and the colour of the test line is the same as or more intense than the control line. Both lines will be the same thickness. See Question 4 in the frequently asked questions.
Negative Result
If only one coloured line appears on the test strip and there is no line in the test section, then this is a negative result.
If you see 2 lines but the colour of the test line is less intense than the control line, then this is also a negative result. See Question 5 in the frequently asked questions.
Invalid Result
If no lines appear anywhere on the test strip or only the test line appears, the test has not worked properly and is invalid. 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. See Question 3 in the frequently asked questions.
The First Vue 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.
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.
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.
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.
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.
No, you can stop testing once you have detected your LH surge.
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.
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.
You may wish to discuss your results with your doctor or call our helpline on 0333 320 2072.
Advisors available Mon – Fri 9-5
Alternatively, you can use our contact form to submit your enquiry.
Your Cycle Length (Day):
Start Test On (Day):
Your Cycle Length (Day):/Start Test On (Day):