Surrogacy is the practice of carrying a child that is not biologically your own. It allows women who cannot carry a pregnancy the chance to have a child that is biologically theirs. Surrogates are healthy women who are usually impregnated using fertilized eggs created through invitro fertilization. The eggs come from either a donor or the biological mother and are fertilized with the father's sperm.
Surrogacy is an expensive way to have a child in developed nations. However, since the only requirement for the surrogate is that she be healthy and of child-bearing age, it is much cheaper in other countries. Because the cost of living is lower in these countries, the biological parents can furnish the surrogate with the necessary essentials such as healthy food for much less money.