Unborn child is a term used to describe a fetus or embryo that is still growing inside the mother's womb. It is a term commonly used in medical and legal contexts. However, there are several synonyms that can be used to refer to an unborn child, including the terms preborn, prenatal, and in utero. Some people may also use terms such as fetal, embryonic, or gestational to describe an unborn child. These terms are often used interchangeably, but they all refer to the same thing: a developing human life that has not yet been born, and is therefore still entirely dependent on the mother for its survival.