Comment by 93po

It seems it might be more a combination of whether it's a social animal and how much help / how much danger the offspring is actually in. There's not a whole lot that fucks with elephants, and not a lot that successfully fucks with the young ones. And female elephants universally live in groups and collectively all protect each other. Female lions tend to do the same, and also have very few things that fuck with them.

Conversely human offspring is especially weak and incapable and susceptible to harm, and experiences a lot of threat even within the same species.

Not sure where that are of whale and chimps fit into that - flukes can also happen I guess.