When cultured on degenerated feeder layers or in suspension, EG cells formed embryoid bodies (EBs) in vitro.

• 当EG细胞脱离饲养层悬浮培养，或在衰老的饲养层上延迟培养时，发现EG细胞或单个存在，或聚集成团，形成类似于早期胚胎的囊状胚体结构.