REMARKS.
One cannot help comparing together the two Ova, thus placed side by side in this Plate. In the figure which represents a larger fœtus, we have a smaller ovum altogether, and a smaller inner cavity; than in the other figure representing a larger Ovum with a larger inner cavity, from which has escaped a smaller fœtus. Yet I hold their respective ages to be the same. This apparent paradox is to be explained by a consideration of the difference of circumstances in which the two Ova were placed. In Ovum 18, the disease was of slow progress; the increase of the fœtus was retarded from the beginning; and its life became extinct after the disorganization of the Ovum had lasted some time: the appearances of the various parts of the Ovum, as pointed out in my explanation of the figure, shew these facts. In Ovum 19 there was nothing in the least analogous. Though the placenta is imperfectly formed; even in its filiform or mossy or primitive texture, it might serve and has served the purpose, of forwarding the nutrition and growth of the fœtus. The disease which destroyed the latter, being of an inflammatory nature, must have been more rapid in its effect. It put an end to life before there could have been time for growth to be much affected.
These facts and inductions may perchance be looked upon by some as merely curious, or at most singular, without being useful. But I think it will be found hereafter, unless I am much mistaken, that by studying such facts and such inductions, as the consideration of the human ovum in its many varieties of diseased development can afford, we may expect no inconsiderable facility in the unravelling of that mystery which yet hangs over the process of utero-gestation.
Plate 6
Joseph Perry del et Lithog. Printed by C. Hullmandel.
Dr. Granville on Abortion
and the Diseases of Menstruation