Anyone knowledgeable? I used to know these things when I was ttc'ing DC1, but appear to have forgotten. It's cycle 18 now so am attempting to try a bit harder. This is a positive OPK isn't it? Will my (diagnosed 3 years ago) pcos affect it? My cycles have been between 25 and 35 days since DD was 4 months, most have been about 26 to 28 days.