Human physiology (Volume 2) . ovulum, which hasalready penetrated about an inch into the cavity of the uterinedecidua ; but neither in these, nor in the specimen of the RoyalCollege, is any part of the uterine decidua pushed forward. Theovum appears to have its natural covering ; and, in the Collegespecimen, there is a large space between them and the deciduouslining of the uterus. Dr. Granville regards the decidua reflexa tobe the external membrane of the ovum, to which Professor Boer,of Konigsberg, gave the name cortical membrane, and whichDr. Granville terms cortex It has received var
Human physiology (Volume 2) . ovulum, which hasalready penetrated about an inch into the cavity of the uterinedecidua ; but neither in these, nor in the specimen of the RoyalCollege, is any part of the uterine decidua pushed forward. Theovum appears to have its natural covering ; and, in the Collegespecimen, there is a large space between them and the deciduouslining of the uterus. Dr. Granville regards the decidua reflexa tobe the external membrane of the ovum, to which Professor Boer,of Konigsberg, gave the name cortical membrane, and whichDr. Granville terms cortex It has received various Albinus, it was termed involucrum membranaceum ; by Ho-boken, membrana retiformis chorii; by Roederer, membranafilamentosa; by Blumenbach, membrana adventitia; and byOsiander, membrana To this membrane — and to thedecidua uteri, as connected with the placenta — we shall have torefer hereafter. Such is the uncertain state of our information on this interestingtopic of intra-uterine anatomy. Fig. Extra-Ulerinc Pregnancy,a. The uterus, its cavities laid open. b. Its parietes thickened, as in natural pregnancy, c. Aportion of decidua separated from its inner surface. Burdach, Physiologie als Erfahrungswissenschaft, ii. 75, who refers to the variousviews on the subject of the decidua reflexa. See, also, Velpeau, in op. cit.; and Fur-kinje, art. Ei, in Wbrterb. dor Mcdicin. Wissensch. x. 107, Berlin, 1834. 416 GENERATION. even formed, according to Breschet,3 in all cases of extra-uterinepregnancy.
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