Identifier: systemofmidwife00leis (find matches)
Title: A system of midwifery, including the diseases of pregnancy and the puerperal state
Year: 1875 (1870s)
Authors: Leishman, William, 1834-1894. (from old catalog) Parry, John S., 1843-1876, (from old catalog) ed
Subjects: Obstetrics
Publisher: Philadelphia, H. C. Lea
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

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Text Appearing Before Image:
he mechanical difficulties of delivery may be said to have ter-minated ; for the extent to which the parts have been dilated duringthe birth of the head, will have rendered them more than sufficient forthe egress of the parts which remain. The Placenta escapes edgewise,folded as formerly described, and not inverted, as is usually asserted. We have, in the above description of the first position, gone prettyfully into detail, in order that the other three positions may be moreeasily understood. We would recommend the student, before attempt-ing any practical investigation of the facts which have been set forth, tofollow the description with the bones in his hand,—by which meansonly can he thoroughly understand the subject, to the extent which isessential as a preliminary to the intelligent examination of the phe-nomena of actual labor. The figure here shown indicates, diagrammatically, the various posi-tions which the child occupies during the successive stages of labor, as Fig. 108.
Text Appearing After Image:
Diagrammatic representation of successive stages of the first position. just described. The representation is supposed to be of a woman fromwhose body the right half has been removed, leaving the foetus aloneuntouched. Second Position.—This is the converse of the First. As the head 300 MECHANISM OF LABOR. (chap. enters the brim of the pelvis, the occiput is turned towards the rightilio-pectineal eminence, the forehead being directed to the left sacro-iliac synchondrosis. This, therefore, like the first, is an occipito-anterior position, the only difference being that it occupies the leftoblique diameter instead of the right. It is the left side of the headwhich presents, and the neighborhood of the left parietal protuber-ance is, therefore, the part which the finger first reaches in a digitalexamination. The sagittal suture corresponds to the left obliquediameter, so that when the woman is on her left side, the finger passesupwards and forwards, to reach the posterior fontanelle, an

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