Because of the emotional, physical, and financial toll exacted by IVF, it is preferable that no one undertake a one‑shot attempt. If a couple can only afford one treatment cycle, IVF is probably not the right course of action.  After all, with conventional IVF there is only about one chance in three that it will result in a live birth ‑and a tremendous letdown if it fails. It is thus unreasonable to undergo IVF with the attitude that “if it doesn’t work the first time, we’re giving up.” In vitro fertilization is a gamble even in the best of circumstances.