surrogate mother
noun
1
- a person, animal, or thing which takes on all or part of the role of mother to another person or animal（人或动物的）代理母亲。
2
- a woman who bears a child on behalf of another woman, either from her own egg fertilized by the other woman's partner, or from the implantation in her womb of a fertilized egg from the other woman代孕母亲。