system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 : Why is it so rare for humans to have twins and triplets but animals have them all the time?
gpt
Well women usually release one egg per cycle unlikes a lot of female animals where multiple eggs are released, like in cats.

From an evolution point of view, it also make sense, human babies have a huge head making birth very difficult, before modern medicine the maternal mortality (dying while giving birth) was pretty high. And that is just for one baby.

Imagine giving birth to triplets in middle age europe without the techniques we have today.