Taking a break between IUI's

This is probably a stupid question but we had our first IUI in November that failed so we decided to take a few months off for financial reasons and my husband is gone in Jan. when we'd probably do the procedure again then in March we have a trip planned so if nothing has happened by then we will go in again in April! Anyways my question is does it effect your chances of getting pregnant if you do round after round after round u till it either works or you give up or will our chances be the same with us taking a 4 month break between procedures? Anyone else take a break then went back in for a 2nd or 3rd time and it was successful?