From time to time GFC selects surrogates to carry the embryo. Surrogacy is an arrangement in which a woman carries and delivers a child for another couple or person. The surrogate may be the childs genetic mother called traditional surrogacy), or she may be genetically unrelated to the child (called gestational surrogacy). In a traditional surrogacy, the child may be conceived via home natural or artificial insemination using fresh or frozen sperm impregnated via intrauterine insemination, performed at GFC. A gestational surrogacy requires the transfer of a previously created embryo and for this reason the process always takes place in a clinical setting.

The intended parents sometimes called the social parents, may arrange a surrogate because of female factors or other issues which make pregnancy or delivery impossible, risky or otherwise undesirable, or because the intended parent or parents are male. The gametes may be provided by the ‘commissioning’ parents, eggs, sperms and embryos from donors may also be used.