Transactions of the Obstetrical Society of London. Vol. XIV

Transactions of the Obstetrical Society of London. Vol. XIV

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1873 edition. Excerpt: ...escaped, but blood surely must have.been there in some quantity were it naturally there, the tendency being, when submerged in blood, for the cavity to admit rather than expel blood. Should it be suspected that it might have escaped through the veins, then it was found that the decidual vessels were full, but no signs of communication between these vessels and the cavity were observable. Again, I found the appearance of the surface of thedecidua to which the villi were attached was unchanged from that of the exterior, the openings of the uterine follicles being distinctly marked, though larger, of course, than those of the other decidua, nor was there any sign that the superficial capillary network had been changed so as to surround the villi. It might be thought that this was an exceptional case, but upon consideration for a moment it will be seen that one such fact is worth a large number to the contrary, because, as has already been pointed out, the chances for blood to enter a cavity or space like that of the placenta or this one just alluded to, are so great that it is a wonder that it is ever absent at all. But this is really not an exceptional case; I have found other early ova in which no trace of blood has been found, and at a later period of pregnancy I shall hereafter show that total absence of blood is not so uncommon when the placenta is examined in situ, and without injection through the vessels. Again, if we open the decidual cavity in which the ovum is lodged we shall find the villi running from chorion to the inner surface of the chamber; but I have never been able to find any sign in any part which showed that one portion of a villus differed, excepting in size and vascularity, from the other part. If ova are taken at any period...show more

Product details

  • Paperback | 134 pages
  • 189 x 246 x 7mm | 254g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236668073
  • 9781236668073