Nobody knew in advance that in vitro fertilization would be, by and large, safe.
没有人事先知道体外受精大体上是安全的。
-- Leon Richard Kass 利昂·理查德·卡斯
Nobody knew in advance that in vitro fertilization would be, by and large, safe.
没有人事先知道体外受精大体上是安全的。
-- Leon Richard Kass 利昂·理查德·卡斯