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Article
August 1961

Hemodynamic Observations During Birth of the Lamb: Studies of the Unanesthetized Full-Term Animal

Author Affiliations

CHAPEL HILL, N.C.
From the Departments of Pediatrics, Obstetrics, and Pathology of the University of North Carolina School of Medicine.

Am J Dis Child. 1961;102(2):180-189. doi:10.1001/archpedi.1961.02080010182005
Abstract

In the process of birth, very complex circulatory changes occur during the transition from fetal to neonatal states. Because of the rapidity of these important changes and the dangers involved in their study, observations of the human infant have been limited. Studies of some of the physiologic changes that occur at birth of the newborn lamb have been performed by Barcroft,1 Barron,2 Dawes,3-11 Born,12-15 and others.16-18 The findings of these workers have provided insight into the circulatory changes at birth of the human infant. In their investigations, sequential observations of the birth of the unanesthetized lamb have been few. It is the purpose of

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