Why doctor suggest duphaston Though I'm regular in my period? After analysing I came to know duphaston helps to regularise periods. But I'm regular in my periods 27 to 28 days every month. My adviced me to use 15 days after ovulation. Also I'm using folic acid tablets everyday at night. Now I'm 6 days late for my period still now no spots. But little pain in my right abdomen lasts for 5 to 10 secs. Feeling nausea, hungry, back ache, changes in breast size. Am i pregnant? duphaston delay period?