Pcos diagnosis & letrozole

mw17 • 👼🏼 👼🏼 trying to conceive our rainbow baby 🌈

Finally got a diagnosis of pcos and the Dr. gave me provera to jump start my period. Well I started and she is prescribing me letrozole. She wants me to take it cycle days 5-10 but everywhere else I see people taking it days 3-7. Anyone ever taken it later in their cycle, and how many rounds of letrozole did it take before you got pregnant?