I'm honestly not sure any more, Toots. Back in the day......(yes, I'm ANCIENT) they recommended we wait at least until our first period after removal before we began trying. I can't help but think things have changed in the 30 years since I had an IUD. You're very best and smartest move would be to ask your OB/GYN.
Good luck on the baby making! At least that's the fun part! ; )
Peace
Greenlydia