pelvis is also important
THE BABY FITS INTO THE PELVIS OF A WOMAN BECAUSE IT'S SHAPED LIKE A TILTED BUCKET TO THE FRONT
BECAUSE THE FEMALE PELVIS IS WIDER, THE PUBIC ARCH IS ALSO WIDER, THIS MAKES A WOMAN'S LEGS TO BE PLACED FURTHER APART IN THE PELVIS, WHICH HELPS IN CHILD BEARING, THIS CAUSES THE HIP JOINTS TO JUT OUT
THIS JUTTING OUT AND WIDE PELVIS MAKES FEMALES TO HAVE AN HOURGLASS FIGURE TOGETHER WITH THEIR MORE PROMINENT S SHAPED SPINE, WHICH IS SHAPED THAT WAY TO CARRY THE LOAD OF BEING PREGNANT