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How exactly does an OPK work? Why do I get a light line one time, and no line the next?
I am confused how OPK's work. I had an early/spontaneous MC on 2/17. I bled until 2/19. I has EWCM on the 26th so I took an ovulation test. I'm leaning towards neg, but confused because of the first response test I took today has no test line at all. Thoughts?(Photo in my HPT images)
1 Answer • 8 years ago
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Ur LH levels fluctuate throughout the day, everyday, so ur tests will do the same as well. Tests also depend a lot on urine concentration, this can make a huge diff between a positive and no (or next to no) line at all. Then there's the test used, like hpt's, some opk's are more sensitive than others. Some opk's have a threshold of 25 or 30. A surge only needs to hit >20, so getting more sensitive opk's is beneficial for those who may not surge much higher than a 20.
Hope that helps a bit. Good luck! =))
8 years ago
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