I was going to go for the coil and was told that once it was removed then within 3 months i would be fertile again, i have never heard about it not being given if you want kids, its a short ter sterilisation method, meaning once removed you can concieve.
I was informed also that my body may have some heavy periods until i got used to my natural rythym again, and from a friends point of view that is quite true, but again within a couple of months she was fine.
Good luck!!