I prefer prarie doggin' it to turtle headin' it. Just a preference . . . Kinda like Chapter 10.
I believe the proper terminology, which Daryl would insist upon im sure, is "crowning" and can be measured in "centimeters dilated". Ranging from zero to approx 5 cm, or so called "fully dilated".
The other consideration is volume and shear numbers. And so you "must prepare" accordingly. In this regard Mike is known in some arenas as "Octoman".
__________________ The student senses his teacher’s steadfast belief and quiet resolve: “This is doable. It is doable by you. The pathway is there. All you need is determination and time.” And together, they make it happen.