90% of bulldogs require c-section to deliver successfully.

It can become a problem in humans, but as our evolution may be self-directed, we might also decide that larger cranium-to-pelvis ratios make it easier to educate those babies to become obstetric surgeons.

And eventually, it might be prudent to gene-hack the plumbing, to reroute the birth canal so that it does not pass through the pelvic opening. Then enormous-head mutations could more easily survive without intervention.