With Aidan I had a two-day cut-off -- obviously a boy!

With my other boys, I didn't have any cut-off, and Kevin FOR SURE was on O day.
I would start with a 4 day cut-off, at least that's what Shettles recommends. Then if nothing happens, inch a day closer each time, but be careful of how close you get to O day. It also depends on how "mobile" your dh's sperm are. They say sperm can live up to 5 days, but every man's

is different, kwim?