Hello
I have previously used cheapy Tescos or Wilkinsons opks, with mixed results - sometimes I would get a clear positve, some months not. (One month I didn't, and got pg, so I know I am ovulating, but I mc at 11 weeks :(). So this month I invested in some cb digital tests. I am day 12 today, and I've got loads of ewcm, yet I haven't had a smiley face yet. I've been using them first thing, as it says to do in the leaflet, my question is why can I use fmu for these tests, but not for the 'line' style ones? I have always previously used them either mid morning or mid afternoon.