BACKGROUND: Presently, some problems still exists during establishment and culture of embryo multipotential stem cells, such as low rate of establishment, low rate of stem cells with normal karyotype.

• 背景：目前在胚胎多潜能干细胞建系和培养过程中，存在着建系率低、具有正常核型的干细胞系比率低等问题。