We were instructed to dtd AT LEAST every other day. In previous cycles we dtd every day and still hadn't fell pregnant but were afraid that we would miss a chance if we skipped days. Last cycle we dtd every other day, then when we got positive opk we dtd that day and for 2 consecutive days after that day (so 3 days straight) and then went back to every other day until cd 21-my cycles are about 30 days. Dr told us to go until cd21. We feel like that method would help us not miss the egg.