Does IUD Provide Complete Protection Against Pregnancy?

hi doctors im a 22 year old mother of a handsome 20 month old toddler boy. im 173 pounds, im 5'5, blood type rh negative and im going to get the IUD inserted but I had some concerns one I enjoy having sex with my husband so when he has to pull out before he cums its a downer for me so my question is when having the IUD is he going to be able to cum inside of me