when is the right time?

We have been trying to have a baby... today is monday and according sa period tracker ko po sa thursday po ang ovulation period ko, so when should we have sex? Kasi according to my dr everyday pero others would say that the day before the ovulation period, at least may 3-4 days no contact para may quality po ang sperm and other would say different thought also.. whats the most effective way para sa inyo mga momshies?