There are already 10,000 frozen embryos floating around in liquid-nitrogen baths in the U.S., stuck in a kind of icy limbo as their would-be parents sort out the options.

• 没有目前已经有超过一万个冰冻胚胎泡在液态氧里，卡在一个冰冻的三不管地带，而它们的父母还在研究如何选择。