who knew there was a better way to get tendies than meme stocks

The rates of pregnancy mortality are naturally far higher than other mammals. This is hard to quantify, but pregnancy used to be a significant mortality risk not that long ago. I can't think of another mammal where this is the case.

Most of the reason why is walking upright. Evolution has to work with what it has and to take a quadruped and make a biped it came up with some less than ideal solutions. Our spines for example are terrible need to balance weight towards the back let's add some S curves. An "intelligent designer" would have been fired for that work around.

Our hips also had to change shape and shift back and forward and needed greater flexibility in the ball joints. Initially the sacrum became broader allowing the birth canal to become larger allowing for larger head seizes, but then larger head sizes were selected for. Birth canal size limited by the pelvis and baby weight (too low lower baby survival too high birth mortality) led to a high selective pressure around an ideal baby weight. Until recently it was of the best examples of optimized selection. Even with the high birth risks larger head size was still favorable so fetus skulls are born not fully formed which is why babies have soft spots in there head. The unfused skull can deform during birth to squeeze through the pelvis and why they can come out looking like cone-heads.

Walking upright and selection for increasing large heads made for a dangerous combination to human women and if there was an "intelligent designer" they really phoned it in.