So similar, in fact, a standard ovulation
test (OPK) is unable to distinguish between LH and hCG in your
urine. Therefore, if you have enough of either of the two hormones (LH or hCG) in your urine at the time you test using an OPK, you will get a positive result on the OPK.
In theory, therefore, a positive result on an ovulation test taken after you have missed a period could definitely indicate that you are pregnant.