Home pregnancy tests are testing for hcG. Ovulation tests are testing for
LH. Chemically, these two hormones are extremely similar. So similar, in
fact, that hcG is mistaken as LH by ovulation tests. (A home pregnancy test, however, does not mistake LH for hcG.)
Given that ovulation tests are cheaper than home pregnancy tests, frugal
peestick enthusiasts often want to know if they can simply use OPKs to test
for pregnancy. The answer? Yes... BUT
*a HPT will almost always pick up on a pregnancy before an OPK
*only a HPT will confirm you are pregnant. A positive OPK could mean
you are ovulating.
*this isn't what OPKs were intended to do, so don't blame the
peesticks when they don't bow down to your madness
So in short, if you truly are pregnant you should be getting BFP's on HPT's now.
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