I think she's trying to have the human reproduction talk.

我觉得她是想跟我们聊人类繁衍的那件事。

If" the talk" is in regards to human reproduction, I already understand how that works.

如果是“谈谈”人类繁殖方面的，我已经知道流程了。

I think my 12-year-old niece knows more about human reproduction than I did in my 20s!

我想我12岁大的外甥女比20多岁时的我懂得更多人类生殖的知识。

In our society, any discussion of human reproduction seems to be so upsetting, it causes nothing but chaos.

在我们的社会，任何有关人类繁殖的讨论都会让人十分不快，这话题只会造成混乱。

A big part of his work focuses on the physical aspects of human reproduction and childbirth and how trends and practices in childbirth have changed throughout time.

他的大部分工作都集中在人类生殖和分娩的物理方面，以及分娩的趋势和做法如何随着时间的推移而发生变化。