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GAZZETTA MEDICA ITALIANA ARCHIVIO PER LE SCIENZE MEDICHE

A Journal on Internal Medicine and Pharmacology


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Gazzetta Medica Italiana Archivio per le Scienze Mediche 2005 August;164(4):317-24

language: Italian

Study contribution to the shoulder disengagement mechanism in physiological childbirth

Mergoni A.

Specialista in Ostetricia e Ginecologia, Salsomaggiore Terme, Parma


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The present paper expresses the conviction that the traditionally adopted interpretative model of childbirth physiology fails to explain exactly how the normal fetal shoulder disengagement mechanism takes place. In order to acquire plausible, motivated knowledge in this regard, it is considered insufficient to partially amend the ruling interpretative model, and the opinion is put forward that another completely alternative model must be formulated. A satisfactory contribution to this research prospect derives from a study of the origin, composition and behaviour of the efficient forces of childbirth which possess the ability to trigger, at least generally speaking, hydraulic type phenomena. Through the approval of Pascal’s principle, we arrive at the recognition of a “pelvic press” type of mechanics that leads to the solution of many unsolved problems in childbirth physiology which also offers a reliable explanation of the fetal shoulder disengagement mechanism.

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