My name is Barbara Durrant and I'm director of reproductive sciences at San Diego zoo Wildlife Alliance.

我是芭芭拉·杜兰特，圣地亚哥动物园野生动物联盟生殖科学主任。

That's Diana Greene Foster, a professor of obstetrics, gynecology and reproductive sciences at the University of California, San Francisco.

加州大学旧金山分校的产科、妇科和生殖科学教授戴安娜·格林·福斯特说。