A.W.
I had an IUD put in after my first child. I didn't think we were going to have more... anyway... it was great at first. The first year I didn't notice anything out of the ordinary. Soon, I began having pain during intercourse and my period became extrememly heavy and lasted about 2 weeks. Once we decided we were going to have another child, I had it removed, and all of the pain and heavy periods went away. Each person is different, so you might not react that way. I have read a lot of posts about IUDs and many women LOVE them... after this child my husband is having a vasectomy, so at least I don't have to worry about it anymore!
GOOD LUCK!