If you’re about to take an ovulation test and want to know how to interpret the results, read this quick guide.
By women's health expert Halle Tecco, MPH, MBA
Ovulation tests (aka ovulation predictor kits) are clinically proven to identify your fertile window. They help you get to know your body and its variations, and identify the time when you're most likely to conceive.
After you follow the test instructions, pee on the test or dip the strip in urine, and wait for a result, take a close look at the two lines. One is the control line (C), which is there to make sure the test worked. The other is the test line (T) that shows the ovulation result.
Unlike a pregnancy test, two lines alone is not a positive result since your body makes LH at low levels throughout your cycle. A result is only positive if the test line (T) is as dark or darker than the control line (C) line.
Unlike a pregnancy test, two lines alone [on an ovulation test] is not a positive result since your body makes LH at low levels throughout your cycle.
Positive: In short, if the test line (T) is as dark or darker than the control line (C), the test is positive and you'll likely ovulate within 36 hours. If you want to get pregnant this month, now is the time.
Negative: If only the control line (C) shows up, or if the control line (C) is darker than the test line (T), the test is negative (you are not having an LH surge). Test again tomorrow.
Invalid: If only the test line (T) shows up, or neither lines show up, the test didn’t work. This could mean the absorbent tip wasn’t saturated with enough urine, or the test is damaged or expired (check the wrapper). Grab another test and try again. If you still get an invalid result, contact us.
- Wondering when and how to use an ovulation test? We break it down for you here.
- What does a positive ovulation test look like? See actual results from women who have used Natalist midstream Ovulation Tests to get pregnant.
- Want the full scoop? Check out The Ovulation Test Cheat Sheet.
- Learn more about our midstream ovulation test sticks here.