Dam. Imagine a world where you 3D print your kid instead of reproducing the regular way
I've imagined this world.. and in all likelihood, there may not be any women... "total sausage fest"..

Unless at that point, they would be advanced in bio-tech such that they can remove the yearning to have a baby FROM women.. and perhaps not created the womb at all..
In which case... there'd probably be only a world WITH women, because they're more aerodynamic..
AND/Or they might then create a New hybrid that is both as strong as a man.. but aerodynamic as a woman..
OR... we would be able to engineer someone with giant heads.. and extra arms...
OR we would perhaps genetically engineer a medium size "horse human" who could run really fast ontop of having ARMS....
OR we could probably upload ourselves into a computer.. <---This is my dream...

This would cut down requirements on motored transportation...