What the others have said I agree with.
Yes, all humans have LH in their bodies always that is why for a positive opk the line has to be at least as dark as the control.
Howver as others have said many women don't get a true positive and still ovulate (me!).
The reason LH strips turn positive is that they detect hcg as well. It will not matter if you have suppressed lh as Ryn did if you are pregnant an opk will show a second line. However this can't be used as a diagnosis as only a hpt or blood test can. The reason is is because you could be ovulating or have pcos or some other unusual metabolic disorders which cause increased lh.
Having said all of this I always get a second line on my opk before I get a second line on my hpt. I hope you are pregnant. Was the line quite prominent? Have you used lh strips during a cycle before and do you usually get a second line? If the answer is no I really think you should get a Quantatative Serum BHCG done. This will tell you for sure.
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