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During the last few years a great deal of work has been done in the field of physiologic chemistry as applied to medicine. The author of this monograph chose a limited field; namely, the physiologic chemistry of labor. For his material he used not only his own extensive observations but also the vast literature on the subject. From the point of view of physiologic chemistry, labor cannot be considered as a single process. Research in this field indicates that labor must be divided into four parts: (1) the period of dilatation, (2) the major portion of the second stage, (3) the actual expulsion of the child, and (4) the placental stage. For each of these four periods, distinct and characteristic physical-chemical alterations take place in the blood. These changes and their causes are described in detail. The author also discusses the changes that occur during the puerperium. The monograph is
Die physiologische Chemie der Geburt. JAMA. 1932;98(25):2234. doi:10.1001/jama.1932.02730510060029
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