Thanks for your query.
are not supposed to be taken together.
Clomid is to be taken on 3rd day of menses and duphaston to be taken on 12th day to 25th day of menses.
Clomid is given for induction of ovulation and duphaston is given to correct progesterone deficiency
as in your case.
Duphaston does not inhibit ovulation so clomid will has its effect.
Best of luck