Not able to conceive after 7 months of miscarriage(d&c), menstrual cycle is of 25 days...?

Unknown: Infertility is defined as one year of an inability to conceive in a women with regular menstrual cycles. Miscarriages at this age are due to a chromosomally abnormality of the embryo in greater than 2/3 of cases and is a random event. If you can still not conceive six months after a miscarriage with regular menses then see your ob/gyn.