WW Cattle Maternity Pen, by Far and Wild Cattle Company in Woodinville, Washington.

Designed for maximum operator safety,

the W-W Maternity Pen allows for effective control of the heifer:

(click on picture for larger view)

The "split" gate facilitates many functions including calving, nursing, or the occasional Caesarian.

Now the vet won't balk at pulling a calf when you have a W-W Maternity Pen instead of a sturdy ole' post and lariat.