Sorry for asking. I read somewhere it was possible. I just wondered if anyone had experienced it.
Is the OPK SUPER positive or do you just have two lines? Check out peeonastick.com - She talks about it there.
It's not entirely reliable because you always have some amount of LH (the hormone that the OPK measures) in your system. HCG is a similar hormone, and if you have enough of it in your system to turn an HPT positive, you *might* be able to turn an OPK positive.
What it comes down to is, if you think you might be pregnant and want to know, then take an HPT.