File:Hertig1956 fig77.jpg

Fig. 77. Abnormal Previllous Ova about 12 to 13 days

A medium-power view of the section through the greatest diameter of an abnormal previllous ovum to show the extreme dilatation of the trophoblastie lacunae. Note the marked hypoplasia of the syncytiotrophoblast which is reduced to fine irregular strands and the relative paucity of cytotrophoblast and the primordial villi resulting therefrom. Note well-formed amnion but relatively small germ disc. The development of the yolk-sac cavity beneath the latter is inconsistent with that of the trophoblast. The primary defect probably lies in the trophoblast with corresponding deficiencies in the structures derived therefrom. Note also the significant deeidual reaction with pronounced leucoeytic infiltration. Inevitable early abortion can be predicted for such a specimen on the basis of its lack of ability to maintain function of the corpus luteum. Such an abortion might take the form of a profuse flow not much later than the next expected period and thus give no undisputed evidence of its true nature. Carnegie 7850, Section 14-3-4. X 100.

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Reference

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.

Cite this page: Hill, M.A. (2024, April 27) Embryology Hertig1956 fig77.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Hertig1956_fig77.jpg

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