A textbook of obstetrics . Fig. 214.—The descent of the head in a vertex presentation, left occipitoanterior position. imposed, therefore, upon any movable body impinging upon thepelvic floor and impelled by a force from above. The occiputcan only travel in the directions named by a rotary movementof the head upon the spine. Sixth Step.— Propulsion and extension of the head in thedirection of least resistance under the pubic arch until it is deliv-ered, again following the direction of the lower pelvic floor,which is now upward, forward, and outward. Seventh Step.—Restitution. The rotary movem
A textbook of obstetrics . Fig. 214.—The descent of the head in a vertex presentation, left occipitoanterior position. imposed, therefore, upon any movable body impinging upon thepelvic floor and impelled by a force from above. The occiputcan only travel in the directions named by a rotary movementof the head upon the spine. Sixth Step.— Propulsion and extension of the head in thedirection of least resistance under the pubic arch until it is deliv-ered, again following the direction of the lower pelvic floor,which is now upward, forward, and outward. Seventh Step.—Restitution. The rotary movement of the 362 THE MECHANISM OF LABOR,. Fig. 215.— The rotation of the head being completed, its propulsion forward and outward begins.
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Keywords: ., bookcentury1800, bookdecade1890, bookidtex, booksubjectobstetrics
