nope i did on ovulation day and it was a boy...3 days b4 should be a girl...so they say, since girls swim slower, takes them a while to get to the egg and boys swim fast but die faster than girls so sex 3 days b4 the boys swam to the egg and there was none there and they died...but the girls should just be making their way there when the egg is being released...
this is of course if there was no sex from then on (until after the fertile period was over)