Embryo onation is a form of third party reproduction. In vitro fertilisation often results in a number of frozen, unused embryos after the woman for whom they were originally created has successfully carried one or more pregnancies to term. In embryo donation, these extra embryos are given to other couples or women for transfer with the goal of producing a successful pregnancy. The resulting child is considered the child of the woman who carries it and gives birth, and not the child of the donor, the same as occurs with egg donation or sperm donation.