Hi. So I had a look at my chart from June last year when I got my last BFP and I had 3 days in a row of positive OPKs (smiley faces) - CD 15,16 and 17. FF marked my crossroads for a definite O on CD 17. DH and I BD on the night that I Oed (night of CD 17). We had also BD on CD 13 but I doubt sperm could last the 4 days to fertilise the egg so I'm guessing it was BD on CD 17 that did it. Anyway, could this be significant in some way since last month we BD the night of my first pos OPK but we got a BFN? Could it be that DH's sperm are not staying alive long enough for the egg if we are DTD at first pos OPK? Also, if we do the SMEP this cycle will his sperm count be ok with BD the 3 days in a row over pos OPK period? Thanks for your reply.