We didn't really "plan" out DTD to get pregnant. We were in Korea and it was the holidays so we both had a lot of time off work and he was moving back to the states in a few weeks. So we probably DTD 2-3x a day for like 3-4 weeks until he left. Hence....we are now pregnant, no surprise...lol. I say do it when the mood strikes you and not be so ridged and structured in your BDing.