Surrogate parent 有兩種情況：

1. A person who carries out the role of a parant by court appointment or the voluntary assumption of parental responsibilities. (See Blak's Law Dictionary,7th edition, 1999)

2. A woman, called "surrogate mother," who conceives a child, carries the child to term, on behalf of another woman an then assigns here parentall rights to that woman and the father under a surrogate patenting agreement. 即“代理孕母”〈參閱拙文“美國法律新詞試譯”載《中國翻譯》2000/4 期，P. 47, Baby M Laws 條〉

此處顯然是指第一種情況，如譯作“代理”或“替身”似乎都不十分妥貼。漢語中原有“X 代父職”和“X 代母職”的說法，應可借用，譯為 “代父母”。