WE ALSO SOUGHT TO DETERMINE whether we could induce human eggs to divide into early embryos without being fertilized by a sperm or being enucleated and injected with a donor cell.

• 我们也想知道，卵子是否可以无需精子的受精作用，或不必去核再注入其他细胞核，就可以直接分裂成早期胚胎。