An egg donor is similar to an organ donor, lending his body to others so they can achieve betterment in their lives. In gestational surrogacy, the sperm and the egg come from third parties and the embryo is then implanted into the surrogate. In regard to certain legalities, some countries allow NON-PROFIT or subrogation by relatives where the mother has no genetic link to the baby. This, together with the development conditions of the country are the main differences in the legal regulation.
In Spain there is a contractual relationship between a pregnant woman and prospective parents. According to Spanish legislation, Spain acknowledges a mother to be one who gives birth to the child regardless of their genetic relationship with it. If you're considering this method to achieve parenthood and you have already read the legislation of Spain, ensure you know the law in the various countries also where the child may be prospectively born. According to existing legislation, Spain does not constitute it a criminal or administrative offence if a Spanish citizen uses gestational subrogation in another country.
There are several options for the latter: