This is an option for women with viable eggs, but who don't have a normal uterus or can't carry a baby for other medical reasons. A woman's eggs are removed, fertilized with the male's sperm and the embryos are implanted in a surrogate mother's uterus.
In some cases a woman has adequate ovarian reserve, resulting in the successful production of mature preovulatory "oocytes" or eggs. However, she may have an absenct or damaged uterus. In such cases a surrogate is used who carries the embryo derived from the mother's eggs and the father's sperm. The woman carrier is called the gestational surragate, since she is allowing the gestation of someone else's embryo who is not biologically connected to her from a genetic basis.
The performance of in vitro fertilization using the prospective parents' gametes and the subsequent transfer of the embryos into the uterus of a third party who thereon would carry the baby to term.