Re: Why OPK's should never be used for TTA!
They are ovulation prediction tests. They test for the surge of luteinizing hormone that is released about 24 hours before you ovulate. There may be a little more to it than that but that is what I know about them
Originally Posted by rcima
What is/are OPKs?
Last edited by hminor11; 08-19-2011 at 02:50 PM.