I am having trouble with them also.....I have had some O pains today and yesterday but the OPK's still coming up negative...having noticed a big change in CM though...but the pains for me are a give away.
Its just these tests.....why are they coming up -tive all the time!!!
I have found the lullaby conceptions OPKs to be really good too. I use another brand in conjunction with, just to be sure! As well as temps, CM and Maybe Baby. I also get pains, so I don't think I'll miss O!!!
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