I did not take any offense at what you said newgirl. I EXPECT that people should question anything they read on these boards whether it is written by me or whoever. But likewise I also encourage everyone to question things their doc tells them! I was just clarifying my position/understanding of how Mirena is different to other methods of hormonal contraception.
As an example about professional medical advice, I have a little anecdote that is worth relating. I recently accompanied a friend to see a specialist women's endocrinologist regarding her perimenopausal symptom of very sore breasts. It took 4 months to get her this appointment and in the interim I recommended a very small dose of winny to alleviate the breast tenderness. Winny is a potent antiprogesterone and has been used succesfully 'off label' for this kind of complaint (along with Danazol and Bromocriptine, neither of which was readily available). So anyway, this worked great and she had 4 months without anymore problems. I advised her to tell the endocrinologist EVERYTHING that she had been taking, including the winny. The endo's response was "that's kinda a sledge hammer approach, inhibiting ovarian hormone production with androgens" (she didn't even ask what the dose was, and given my friends otherwise normal menstrual cycles I think this was way off the mark-she completely lacked any idea that we were using it as an antiprogesterone). On top of that, she added that "this method was also likely to backfire on a woman because the AAS is very likely to convert to estrogen at a high rate, leading to even worsening symptoms of breast pain." (Winny cannot aromatize to estrogen, so this is completely wrong, and progesterone is more likely the cause of breast pain anyway, which is why anti-progestins or prolactin inhibitors like bromocriptine are useful). Anyway, my point is that doctors certainly don't know everything about medicine, they know almost nothing about preventative medicine, even less about bodybuilding, and an enquiring, proactive mind is more likely to get better health care than someone who just believes anything a doctor tells them.
All in all this specialist knew nothing about it, and so advised it was not a good idea to take winny and that she should stick to evening primrose oil, eliminating caffeine and alcohol, and that there was otherwise nothing that could be done to help short of putting her on oral contraceptives to control hormonal fluctuations! My friend had tried all of that already (not that the specialist ever asked....)