Dear Doctor, We are planning for pregnency, usullay my wife period cycle at regular, I mean 27/28 days, we consult an infertility doctor, advise to take an duphaston medicine for 18 days, lat menstrual was on jan 13th, its alredy delay for 8 days, but doctor advise to continue the medicine till 20th of this month, we checked the urine test for pregenancy, its shows negative, we have doubt, while using duphaston menstrual not happens or when we can check for pregnency test. Regards Raj