Category:Carnegie Embryo 8370
|Stage 5 Links: Week 2 | Implantation | Lecture | Practical | Carnegie Embryos | Category:Carnegie Stage 5 | Next Stage 6|
|Historic Papers: 1941 | 1944 day 9-10 | 1945 day 7.5 | 1945 day 9-10|
Hertig AT. Rock J. and Adams EC. A description of 34 human ova within the first 17 days of development. (1956) Amer. J Anat., 98:435-493.
71 Implantation site from a pathologic ovum of about 9 days of age. Note irregular contour and ﬂattened appearance with relatively large ulceration. Although this is not typical of a normal implantation site of a late previllous ovum, the type and degree of abnormality could not have been foretold. Carnegie 8370, Sequence 5. X 22.
72 High-power detail through germ disc and amniotic cavity of specimen seen in figure 73. Note close apposition of trophoblast to germ disc. Carnegie 8370, Section 6-3-5. X 300.
73 Section through largest diameter of specimen seen in figure 71. Although there is a germ disc and amniotic cavity (fig. 72), there is essentially no development of the chorionic cavity. This defect, together with the laminar rather than the circmnfcrential arrangement of syncytio- and cytotrophoblast, makes this a pathologic ovum. It is inconceivable that it could have developed much further although it is impossible to predict the precise type of pathologic abortions that would have been produced by this ovum. Carnegie 8370, Section 6-3-5. X 100.
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