system
Given the following post, respond as if you're commenting on Reddit:
human
How did we know about human reproduction before modern medical science?

Today we think it is "obvious" that sex leads to the *possibility* of pregnancy. But how did for example people in the middle age knew that sex led to pregnancy? How did people even know that there is such a concept as fatherhood? I mean they could have believe that staying in the same room for a long time or that marriage leads to pregnancy how did the connection between sex and pregnancy happen before science? Because it's only a *possibility* to get pregnant it must have been much harder "to know".
gpt
If they weren't able to glean that information from observing themselves they could certainly observe it through the maintenance of livestock populations.

We know that they were able to make the association because antiquity is filled with virgin birth stories.