For me there were no pros to having Mirena. I had one insterted to treat endo and not for pg prevention in December and I had it taken out at the end of last month as it caused me no end of trouble. Pain, bloating (I could gain up to 4kg during the bloating stage of the 'cycle'), bleeding for two weeks at a time, getting only 2 weeks of not bleeding before bleeding again. Bad skin, zero libido, moodiness, painful sex. I just felt like I wasn't in control of my body anymore. I actually had to have mine taken out under a general anaesthetic as the entire device had moved inside the uterus, and it caused some scarring where it was pushing into the uterine wall.

Since I have had it out I feel great - no pain, no painful sex and more to the point I am WANTING sex again, no more pimples and just generally feeling better.