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Discussion in 'Trying To Conceive' started by hereitgoes, Jan 24, 2011.
Curious about this! x
I did find a website once that explained it very well, preg test test for HCG, OPKs test for LH - the molecular make-up of both is very similar apparently, and an OPK can detect HCG because it's so similar to LH, but it doesn't work the other way round
Hey Annie - you are very knowledgable!! lol
Its weird because my digital opk had a smiley face on cd16 and now its cd 25 and although theres no smiley face, when I take stick out of monitor a faint 2nd line is appearing whereas there was only one line all week..
Go to www.peeonastick.com . She has all the info on there about it. I do know thought that until you a like 14dpo and already have a BFP on a HPT that you really can't trust the BFP on the OPK for pregnancy.