刘成和妻子都已年近四十。在选择代孕前，他们做过两年半的试管，取卵7次、移植胚胎6次，全都没有着床。
"It is the only piece of science I've ever done that's really emotionally got me," he says.
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In the spirit of the spring season, take a quick second to learn how to recycle Amazon packaging. It's easier than you think.
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