. On the theory and practice of midwifery . e position of the patient, or of the foetus. Occasionallythe uterus stretches unequally, so as to constitute true obliquity, one sidebeing more developed than the other. Such cases are not common, nordo we know much of their effect upon labour; but I am told that thecelebrated Tiedemann is about to publish a monograph on the subject,which I doubt not will throw light upon it. The axis of the uterus, at the end of gestation, is commonly more per-pendicular than that of the brim of the pelvis; but this want of agreementis rectified at the time of labou
. On the theory and practice of midwifery . e position of the patient, or of the foetus. Occasionallythe uterus stretches unequally, so as to constitute true obliquity, one sidebeing more developed than the other. Such cases are not common, nordo we know much of their effect upon labour; but I am told that thecelebrated Tiedemann is about to publish a monograph on the subject,which I doubt not will throw light upon it. The axis of the uterus, at the end of gestation, is commonly more per-pendicular than that of the brim of the pelvis; but this want of agreementis rectified at the time of labour by the uterine contractions, which tilt thefundus forwards. 160. The lining membrane of the uterus participates in the general UTERO-GESTATION. 109 congestion of the uterus at the time of conception. It becomes turgidwith blood ; its villi, according to Von Baer, elongate, and over and be-tween them is spread a thin layer of pulpy semi-fluid matter, secreted bythe mucous membrane: this is the decidua (fig. 48). It was noticed by Fig. Burton, but described particularly by W. Hunter, and called after himthe decidua of Hunter. The pulpy matter, after a short time, acquiresconsistence, and in its appearance and connection with the subjacentmembrane resembles the coagulable lymph thrown off by mucous mem-branes in a state of disease. It lines the entire cavity of the uterus,closes it inferiorly, and, according to John Hunter and Breschet, sendsoff a short process into the fallopian tube, through which, they say, theovum descends. Dr. Sharpey, of London, whose microscopical researches are so wellknown, on investigating the membrana decidua of a bitch, came to theconclusion that it was not a secretion from the lining membrane of theuterus, but that membrane itself altered and modified.* This view hasbeen confirmed by Bischoff. Having had the opportunity of examiningthe uterus of a woman supposed to have been impregnated about threeweeks before death, he was enabled to demonstra
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