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Midstream (LH) ovulation test pen

Q: How sensitive are these test pens?

A: The sensitivity range is 25mIU/mL and they are 98% accurate.


Q: When should I start using these tests during my cycle?

A: If your cycle is regular(for example 25, 28 or 30 days every month) use our ovulation calculator, found next to the "General FAQ" tab, to predict when you will ovulate. Then, start using the ovulation predictor tests at least 3 days before your predicted ovulation date, using it at exactly the same time every day until you get a positive test result.


Q: If my cycle is irregular every month, how do I know when to start using  the ovulation predictor tests?

A: These tests are very efficient especially when your cycles are irregular, because it is so difficult to determine your exact ovulation date with an ovulation calculator or just counting your days. You will need to buy at least 10-15 tests for a month's cycle to ensure you do not run out after you have started testing and have still not confirmed a positive test result. (Here we recommend you buy our ovulation predictor test strips as they are much more affordable, but just as accurate, as our ovulation pens if you need to buy more than 5 tests a month). You can start testing on day 10 of your cycle(day 1 will be the day you start your period) and keep testing the same time every day until you get a positive test result. You can have intercourse every 3rd day before a positive result and every day when you get a postive test result to improve your changes.


Q: What time of day is the best to check for my LH surge?  

A: Unlike the pregnancy test kit, morning (first morning urine) is not the best time to collect samples for ovulation tests, as LH is synthesized in your body in the morning and will not appear in your urine until the afternoon. The ideal time to collect a urine sample is in the afternoon, though testing may safely take place from 10am to early evening.


Q: Some months I do not get a positive test result at all. Am I doing something wrong?

A: There could be a couple of reasons for this: 

  • Some woman can ovulate as early as day 8 of their cycle. We strongly recommend that you chart your basal body temperature every month to establish what your body's ovulation pattern is and when you ovulate. You can also use another fertility predictor method like our Fertile Focus ovulation microscope to check for your most fertile period to ensure you do not miss your window of opportunity. 
  • Some woman has a LH surge at lower levels and are not always picked up by some ovulation predictor tests. Our ovulation tests are very sensitive and will pick up a low LH surge.
  • Some woman have a LH surge that lasts only 10 hours. If you test once a day at the same time every day, you might miss this surge completely. Once again we urge you to chart your basal body temperature to establish your unique ovulation pattern. If you do pick up a biphasic temperature pattern and still had a negative ovulation predictor test, you might be surging for less than 24 hours and might need to test for your LH surge twice a day.


Q: How long after my LH surge will ovulation take place?

A: Generally, ovulation will take place 12-48 hours after the LH surge is first detected (using afternoon urine samples), though 36 hours is considered to be the average length of time following the LH surge. Once you get a positive, you know you are at peak fertility. Timing intercourse will increase your odds of conception.

* We recommend reading "Taking Charge of Your Fertility" by Toni Wreschler as it has invaluable information on how to chart your basal body temperature, how to check your body for your most fertile period, using products like ovulation predictor tests/kits(OPK's) and much more! *


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