Why do male cheetahs leave the female cheetahs?

yes they mate and then leave and they most of the time never see that female ever again.

the female is left to take care of herself and the cubs it is really quite sad if you think about it! so the simple answer is YES

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also female cheetahs become aggresive when they are pregnant and send the male away, because they dont want the male around when the cubs are born in case he decides to kill them