This is a fairly common question and one that causes quite a lot of anxiety, as not ovulating is a fairly common cause of infertility. However although this is one explanation,there are other possible reasons why you may not detect the LH surge with your ovulation tests.
- The LH surge may have occurred before you started testing and you therefore missed it
- The LH surge may have occurred after you stopped testing and you may have missed it.
- The urine that you tested may have been too dilute, meaning that the concentration of LH in the sample was not sufficient, to give a positive LH test. Make sure you restrict your fluid intake for about 2 hours before you take the test.
- You may have missed the LH surge because you tested at the wrong time of day. This is not uncommon. LH levels are low first thing in the morning and so if you test at this time, you may miss the LH surge. LH levels are usually highest at early to mid afternoon , so this is the best time to collect your urine for LH testing. Knowing the right time to test can be more tricky for shift workers, as their circadian rhythms are disrupted so they may also miss their LH surge.
- LH surge may not be strong enough to be detected by the LH test. Most LH tests detect 40mIU/ml of Lh in the urine. It may be worth trying an ultra sensitive LH ovulation test that detects a lower level i.e. 20mIU/ml.
- Insufficient urine may have been absorbed by the LH ovulation test. if this was the case then there would be no control line visible on the test. It is important to check that the control line is visible. if it is not it means the test has not run and so the result is invalid. If this happens it is worth quickly dipping the test into the urine sample again for a few seconds as it may still work. Do not delay doing this or the result will be invalid because too much time has elapsed.
- The LH test could in fact be faulty, out of date or been incorrectly stored. Although this is quite uncommon, it can happen. To avoid this problem always buy from a reputable supplier.
- You may be testing at the wrong time of your cycle. For women who have irregular periods, knowing when to test can be very difficult.
- You may not have used the test correctly. Make sure that you read the instructions carefully before starting the test and use a timer.
- You may not be going to ovulate this month. This may just be a one off, but if it happens repeatedly you should see your doctor, as it may mean that you are not ovulating and need further investigations.
- You may already be pregnant. There is always a small possibility that you may already be pregnant. If your last period was different to usual, or very light it may be worth doing a pregnancy test.
Ovulation tests are available to purchase online from Access Diagnostics