Is it best to already had a child before getting a i.u.d put in.

Probably yes: Here are some facts: The IUD is most likely to work well for women who have been pregnant before. Women who have never been pregnant are more likely to have pain and cramping after the IUD is inserted. They are also more likely to expel the IUD. But they can still use the IUD.

Works better: in women who have already been pregnant with less side effects.