Pelvimetry for dummies

I’ve spent the afternoon reading sentences like this:

The pelvic sidewalls extend from the upper anterior angle of the sacrosciatic notch at the point of the widest transverse diameter of the pelvic inlet in a downward and forward line to the ischial tuberosities at the point of the widest transverse diameter of the pelvic outlet.

The posterior sagittal diameter is the back part of the anteroposterior diameter, extending from the intersection of the transverse and anteroposterior diameters to the posterior limit of the latter.

The anteroposterior diameter of the pelvic outlet extends from the middle of the inferior margin of the of the symphysis pubis to the tip of the sacrum. Unlike the anteroposterior diameter of the midplane, it does not transect the transverse diameter.

Exactly. Someone please bludgeon me senseless with a blunt object. Thank you.