It's tough to say because everyone reacts differently on clomid. Your body may actually vary from cycle to cycle on clomid. Are you using OPK's to predict ovulation? If not I highly recommend doing so, so you don't miss your surge. I for one O later on clomid. As for TTC a boy, it's better to BD as close to O as possible because they boy spermies are quick but tire easily. Where as girl spermies are slower and but last longer. OPK's should help you predict O and just BD as close to O as possible - of course nothing is fool proof.

GL!