http://www.medications.com/effect/view/30468 mirena DOES NOT prevent ovulation!! meaning you will still ovulate, but the sperm and egg cannot implant themselves which in turn will cause a miscarriage!! This is the same for all iud's, For some unknown reason docs will not tell you this, but my doctor d Wed, 14 May 2008 13:46:13 -0400 http://www.medications.com/effect/view/30468?item=8269 The synthetic hormone...levonorgestrel...does inhibit ovulation. Here is a link for you to look at if you would like. http://www.drugs.com/mtm/levonorgestrel.html http://www.medications.com/effect/view/30468?item=8269 Wed, 14 May 2008 16:03:31 -0400 http://www.medications.com/effect/view/30468?item=8275 Most birth controls work similarly. The Mirena may inhibit ovulation, but may not stop it completely. It almost comes across as if your reasoning to sway women from this product is only due to the fact that they may miscarry. Keep in mind...this happens http://www.medications.com/effect/view/30468?item=8275