. On the theory and practice of midwifery . inches nine lines higher than the pubis. 19. The advantages of this obliquity are obvious; as Dr. F. Ramsbo-tham has truly observed: Were the axes of the trunk and pelvicentrance in the same line, owing to the upright position of the humanfemale, the womb, towards the close of gestation, would gravitate lowinto the pelvis, and produce most injurious pressure on the containedviscera; while, in the early months, not only would the same distressfulinconvenience be occasioned, but there would be great danger of its pro-truding externally, and appearing a
. On the theory and practice of midwifery . inches nine lines higher than the pubis. 19. The advantages of this obliquity are obvious; as Dr. F. Ramsbo-tham has truly observed: Were the axes of the trunk and pelvicentrance in the same line, owing to the upright position of the humanfemale, the womb, towards the close of gestation, would gravitate lowinto the pelvis, and produce most injurious pressure on the containedviscera; while, in the early months, not only would the same distressfulinconvenience be occasioned, but there would be great danger of its pro-truding externally, and appearing as a tumour between the thighs, coveredby the inverted vagina. We may add, that, when not pregnant, thepatient would be obnoxious to prolapse of the uterus and the other pelvicviscera, upon making very slight expulsive efforts. 20. Now let us examine the Pelvis itself. It is divided by the lineaiho-pectinea into the false and true, or upper and lower pelvis. TheUpper or False Pelvis is formed by the lateral divergence of the alae of Fig. the ossa innominata. It is not of much importance obstetrically, exceptfor the general relation which its normal size bears to that of the truepelvis, and the inference to be drawn therefrom as to the normal or ab-normal condition of the latter. Dr. Burns gives the following measure-ments, which I believe are correct:— From the symphysis pubis to thecommencement of the iliac wing at the inferior spinous process, is nearlyfour inches. From the inferior spinous process to the posterior ridge ofthe ilium, a line subtending the hollow of the costa, measures five distance from the superior spine is the same. From the top of thecrest of the ilium to the brim of the pelvis, a direct line measures threeinches and a half. The distance between the two superior anterior spinousprocesses of the ilium is fully ten inches. A line drawn from the top ofthe crest of the ilium to the opposite side measures rather more than eleveninches, and touch
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