Crucially, Dr Gerli's work was completed without interrupting any pregnancies.

至关重要的是，Gerli博士的工作在没有中断任何怀孕的情况下完成。

Dr Gerli and his colleagues, writing this week in Nature Medicine, got over this hurdle by extracting progenitor stem cells from amniotic fluid.

本周， Gerli 博士和他的同事在《自然医学》杂志上撰文称，通过从羊水中提取祖细胞干细胞克服了这一障碍。

" For the first time, we can actually access the fetus without touching the fetus, " says Mattia Gerli, a stem-cell biologist at University College London (UCL).

“这是第一次， 我们实际上可以在不接触胎儿的情况下接触到胎儿，” 伦敦大学学院（UCL）的干细胞生物学家Mattia Gerli说。