File:Hertig1956 fig80.jpg

Fig. 80. Abnormal Implanted Ova about 14 days

An ovum of about 14 days developmental age which should have chorionic villi but shows only extreme hypoplasia of the trophoblast.

Low-power view of the section through the largest diameter of the abnormal ovum shown in figures 78 and 79. The trophoblast around three-quarters of the ovum is extremely hypoplastic and is markedly abnormal in the other one-quarter where there is some attempt to form villi. Note that the germ disc and the formation of amnion and yolk-sac appear morphologically to be unremarkable. This stage of ovular development would coincide with the time of the patient’s next expected period. The deeidual reaction and hemorrhage within the endometrial gland are normal. Abortion might be imminent on the basis of the deficiency of the ehorionic gonadotropin produced by the placenta which maintains corpus luteum function. Actually it is impossible to predict the precise time of such an inevitable abortion. Carnegie 7800, Section 15-1-3. X

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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 fig80.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Hertig1956_fig80.jpg

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