I'm due to ovulate on aug 24th im trying to conceive a lil girl when should I start haveing sex?

2-3 days before ovul. The best chance is around ovulation. It is difficult to pinpoint when ovulation occurs, so it is advisable to have more regular/frequent relation starting 2-3 days before the anticipated ovulation and continue for several days after. Start your prenatal vitamins as well. See your doc to ensure you are in good health before, during, n after pregnancy. Good luck.