定制婴儿，设计婴儿（借助体外受精技术选取胚胎而生出的婴儿，以提供细胞治疗兄弟姐妹的病）a baby that is born from an embryo which was selected from a number of embryos produced using IVF , for example because the parents want a baby that can provide cells to treat a brother's or sister's medical condition