well i just googled it... and the best positions are ones where gravity can help, so missionary, doggy or spooning....
woman on top, bending over and standing are supposedly less helpful positions!!
Also after ejaculation you are supposed to keep your DP/H's penis inside you for a couple of mins... and also not wipe any exess away for 20-30mins.
So DH pulls out whenever we've finished and he's enough energy to pick himself up and rool over or vise-versa (normally within 1min) and i never lie in bed with it still inside me, i go and wipe myself straight away to avoid the dreaded 'wet-patch' situation... now we've always done this and concieved the other 2 dc's.... should we honestly worry were doing things 'wrong' just becasuewe didn't get caught first cycle?