FET (frozen embryo transfer) is the process of thawing and transferring previously-created embryo(s) into a woman's uterus. Many couples are fortunate to have embryos in excess of those chosen for the original transfer. Unless other arrangements have been agreed to, these "surplus embryos" are typically frozen in liquid nitrogen to allow another pregnancy attempt at some future time. As a result, many couples have an opportunity to attempt another pregnancy at a fraction of the cost and involvement physically of a "fresh" IVF cycle as the embryos are already "created".