Thanks Stephk! I even asked DH to work out for me the bd days lol. (How rubbish am I?!) So we looked at last month and I had +OPK on CD15 which happened to be the 4th day anyway but yet we didn't catch the egg so maybe aiming for CD16 which sounds like a good compromise. And if this doesn't work we'll aim for CD17 next month haha. X