I actually don't do the temp, I don't quite understand it and I feel like it'll drive me crazy. So i rely on when I think I ovulate or on the opk test. Look up SMEP , when sperm meets egg plan. Pretty much for a 28 day cycle you want to bd on cd8 and then every other day after that. On cd 10 you want to start opk tests, still bd every other day until you receive that pos opk. You'll want to have sex 3 days straight when get pos skip a day and then do one more day.