File:Hertig1956 fig86.jpg

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Fig. 86. 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 a section of the abnormal ovum shown in figures 84. and 85. Note the malorientation of the embryonic disc with a portion of it still attached to the poorly developed avillous trophoblast at the embryonic pole. The fate of an ovum such as this is unpredictable. This shallowly implanted ovum. with its excellent nbembryonic trophoblast, potentially capable of covering the internal 0a, is possibly related to llofl‘meier’s concept of the etiology of placenta previa. It is interesting to note that 8 months prior to h,vsterectom_v this patient (a para X), delivered a slightly premature stillborn baby whose death was caused by placenta previa, a condition which tends to be somewhat repetitive. Carnegie 8290, Section 25-2-4. 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, May 24) Embryology Hertig1956 fig86.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Hertig1956_fig86.jpg

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© Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G

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