system
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human
ELI5: Do animal mothers in the wild immediately know what sex their offspring are?

Was just watching a documentary about a tiger and her cubs, and the narrator mentioned that litters tend to be 50% male and 50% female.  Does the mother know this right away?  Or does the offspring have to develop more before she can tell?
gpt
They kind of don't have to because it's not really that important at that stage. There might be some odd exceptions within some species, but in general the wild animal momma thinks "baby" rather than "boy baby" or "girl baby", and cares for either just the same. 

Later on when it's older, and depending on whether there's some sort of gender-role in a group society that the young male or female must fit itself into, there might be differences in care that are provided. But at the start they're all nurtured the same.