Hi, I had done my IUI in 6th, 7th december 8th december my dr give me Primolut 5 mg tab for 10 days...I want to know why my dr give me Primolut tab?

Be careful. Presumably your doctor gave you this medication since he/she wanted to put you on Progesterone after the iui. This is fine when started appropriately. The primolut is an artificial Progesterone and should never be taken during pregnancy. Only natural Progesterone or synthetic versions of natural Progesterone should be used. Primolut is fine to bring on the period though.