A woman who gets artificially inseminated with the male partner of the couple looking for child. She then carries the baby and delivers it for the intended parents to raise.
A traditional surrogate is the baby’s biological mother as it was her egg that was fertilized by the sperm from the male partner of the couple. If both of the parents are infertile, then donor sperms can be used.
A breakthrough technique called “in vitro fertilization” (IVF) now makes it possible to gather eggs from the mother, fertilize them with sperm from the father, and place the embryo into the uterus of a gestational surrogate.
The surrogate will then carry the baby until birth. She doesn’t have any genetic ties to the child because it wasn’t her egg that was used for this process
A gestational surrogate is also called the birth mother. The biological mother, though, is still the woman whose egg was fertilized. The gestational surrogate has no genetic ties with the born child.