surrogate pregnancy
Formal or medical term for a pregnancy carried by a surrogate mother.
Surrogate pregnancy is often discussed in terms of law and ethics.
代理母 refers to the surrogate mother herself, while 代理懐胎 refers to the pregnancy or the practice.
Compound of 代理 (surrogate) and 懐胎 (pregnancy). The exact historical derivation is uncertain; the term is used in modern medical and legal contexts.