Treatment of unexplained infertility is superovulation
with IUI. There is no need to take progynova
to increase the thickness of lining as this will prevent pregnancy
. Also as long as you are taking progynova, you won't have menses. So its not surprising that you had delayed menses after taking the medicine. Its better to consult infertility specialist
& get proper treatment. Treatment given for superovulation will increase your estrogen levels & hence endometrial thickness & you won't require progynova for that.
Wish you good health.