Has anyone used utrogesan? After my iui today the nurse gave me some and I have to take two twice a day vaginally from tomorrow for the next 15 days, apparently to help with the lining. I'm a bit confused as I had my progesterone levels done after my last iui and apparently they were fine, so why do I need to take extra now? Also I have to go in for day 21 bloods and I thought they measured progesterone, so wouldn't taking utrogen give a false result??? Any thoughts appreciated!!