The cells were transplanted into mouse testes and were observed to undergo early meiosis - cell division - the next stage to them becoming mature sperm cells, although they did not develop further.

• 这些细胞被移植到睾丸中，观察到它们进行了早期减数分裂（细胞分裂），下一阶段就要变成成熟的精子细胞，尽管他们没有进一步分化。