File:Hertig1956 fig46.jpg

Fig. 46.

Sections at low-power magnification of the three 13-day ova of Horizon VI shown on plate 7. They are characterized by primitive unbranched villi and a distinct yolk-sac.

46 A 13-day ovum with yolk-sac and beginning villi. Note decidual reaction and diluted sinusoids. Also note blood-filled gland lumen at the base of the ovum. This is a frequent finding at this stage of development and is due to leakage of blood from the lncunur spaces into the gland lumen following erosion of the gland epithelium by the invading trophohlast. It is often mistaken for a thrombosed blood vessel. Carnegie 8360, Section 27-4-1. X 35.

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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 fig46.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Hertig1956_fig46.jpg

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