Trying to get pregnant: do you need to lie down after intercourse?

Maybe: Around ovulation, its helpful to put a pillow under your bottom and rest on your back for 20-30 minutes after intercourse. To know when you ovulate, you can use an ovulation prediction test kit. Usually you start testing around day 12 and keep testing until it turns positive. A positive test means you will likely ovulate in 12 to 48 hours so you can time intercourse. Best Wishes!