File:Hertig1956 fig82.jpg

Fig. 82. Abnormal Ova

Two abnormal ova showing malposition of the germ disc and, in one of the specimens, shallow implantation. Whether these ova would ultimately have aborted it is impossible to say.

A medium-power view of the section through the greatest diameter of a 12-day abnormal ovum shown in figures 81 and 83. Note the malposition of the embryonic disc. The normal amniotic development indicates that the malorientation is of recent development since the amnion has been shown to delaminate in situ from adjacent trophoblast at about 7 days of age (Hertig, ’-15). Hence it appears that this normal appearing embryonic. disc has only recently shifted its position due to some unknown factor. It is possible that this maloricntation would have been corrected as the ovum grew and that tile germ disc would have become reoriented. Whether this patient would have aborted ultimately it is impossible to predict, though probably not. It is impossible to say what effect, if any, such an abnormality would have upon the development of the body stalk and the embryo. Carnegie 8299, Section 11-4-5. 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 fig82.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Hertig1956_fig82.jpg

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