Pros and cons of taking estrogen with mirena (levonorgestrel)?

Unusual. It is not necessary to take estrogen with a mirena (levonorgestrel). I would clarify with your doctor why this was prescribed. Perhaps it is for a specific reason and your doctor should be able to explain the rationale.
Balance. A lot of women, myself included, appreciate the balance that taking estrogen offers. Estrogen helps to stabilize the lining of the uterus, and prevent some of the breakthrough bleeding that some (not all) women have with the Mirena (levonorgestrel) iud. Other women like the benefits of estrogen on skin and hair. It's really individual, as different women respond differently to hormones. Hope that helps!

Related Questions

Does Mirena (levonorgestrel) prevents uterine cancer when using Estrogen patches?

It is an option. The Mirena (levonorgestrel) can counteract or balance the estrogen from patches to prevent uterine cancer but the clinical data for this is limited. Everyone's situation is different but it is an option to discuss with your gyn. Here is a reference on Climacteric. 2011 Dec;14(6):622-32. Copy and paste that and you will see the study. Read more...