i used the digital clear blue opks so you don't have to sit there figuring out if one line is darker than the other you just wait for the smiley face :) weird thing is though when i tested with a cheap pregnancy test it was negative but the extra sensitive one that can detect pregnancy 6 days before af is due was positive.
The "test" line must be at least as dark as the control line - the same as when you have a surge. OPK's can detect pregnancy but false positives are common and the tests are not as sensitive as a regular HPT - they should not be a substitute for a HPT.
iff you go to pee on a stick ******* it explains this. LH and HCG are like twins with different hats on, or something like that. HCG can be picked up by OPKS, but LH cannot be picked up by HPts....ithas some good info about it.
I disagree with this...i used opk's, the stick kind, when i was trying to get pregnant with my youngest daughter...i consistantly got NEGATIVES....I finally took an HPT and got a BFP. The opks were coming out negative becuase i was pregnant therefore I wasn't ovulating so there was no LH surge. Just MPO
how? the opk's I have are just strips you dip in your urine and they show 2 lines if your ovulating and 1 line if your not...will it show 2 lines if your pregnant like when your ovulation?
Yes, an OPK can detect pregnancy because HCG is chemically similar to the hormone released when you ovulate. A HPT will not detect when you ovulate though.