Surrogacy is when a woman agrees to become pregnant and give birth to a child for intended parents. There are two main types - traditional surrogacy, where the surrogate uses her own eggs and is biologically related to the child, and gestational surrogacy, where eggs from the intended mother or donor are fertilized in vitro and implanted in the surrogate. Traditional surrogacy poses more psychological and legal risks as the surrogate may form a bond with the child and have a legal right to keep it. Surrogacy also faces religious and ethical debates around interfering with natural reproduction and commercializing pregnancy.