Questionthe are the most experienced side effects with regards to the marine contraceptive.
AnswerHi Bee,
The main side effects are breakthrough bleeding, cramps, and nausea. This should go away after the first few weeks/months. Many women find that their periods become shorter, lighter, or even stop while on Mirena.
Here is a good link about IUDs:
http://www.plannedparenthood.org/health-topics/birth-control/iud-4245.htm
I hope this helps. If you have further questions let me know.
-Mia