Not at all Mommyof2peas. The issues women have after Mirena are likely related to previous undiagnosed problems and the studies of Mirena associated with fertility are very very reassuring. 80% return to fertility within one year and 94% return within 2 years. Its the unfortunate few percent where there are likely previous issues.
Lets not forget also, Mirena is a treatment for conditions such as Endometriosis and of course, Endo can affect fertility (dammit!).
The Copper Coil is not restricted to multiparous (already had a child) women and the only difference between that and Mirena is the minute dose of Progestegin in the coil (which is actually a 7th less of the dose you get in BCP and acts locally rather than systemically therefore having less side effects). The main reason its used with caution in nulliparous women is the fact it is more painful to insert due to the smaller diameter of the cervical os in women who havent had a child.
I was given Mirena for my Endo when I was 23 and Ive never EVER regretted it. If it turns out I struggle with conceiving then Im not going to blame Mirena, Im going to blame the real cause of it - My Endo. It was the best thing I ever chose to have and I fully intend to get another one if I am lucky enough to get pregnant again.
I know some people have experienced side effects and I do feel for them but Mirena does not affect fertility, although I can understand why people feel they need to blame something. It would not have been licensed and made available if it did. In fact, they are planning to extend the time period you can have it in for 7-8 years.
I experienced minimal side effects and the only noticeable difference is that my mood is a *bit* better since removing it but Im willing to accept the side effects because of the freedom from pain Mirena allowed me. Im now struggling with my periods since removal because the excruitiating pain has returned and I miss Mirena more than ever!