I don't have an IUD but I have extremely elevated BGs whenever I use birth control - which has been fairly constant for the last 12 years. Last year, I tried getting off BC and my insulin usage dropped by almost half. When I had to go back on it, my insulin resistance increased and I had to up all my dosages again.
It's the hormones working against you. Unfortunately, there isn't much you can do outside of increasing your insulin dosage (of course you can always try increasing your physical activity too, but that isn't always possible/doesn't always work).
The future belongs to those who believe in the beauty of their dreams.
Thanks. I was hoping to avoid any dosage fluctuations by getting off birth control and choosing a hormone free IUD. I guess there is no way around it.