Which day of cycle to get usg done to detect pcod, in case periods are late than usual date and have not come yet? Can it be any date or during periods or just before periods ? My periods have always been regular but last month i got usg done 3-4 days before periods and got diagnosed with pcod but i doubt that it was before periods so if it's accurate or not as online it says to get it done on the day of periods , this month my periods are 3 days late so now what time to get usg done ? I also have history of endometriosis.