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Updated: June 12, 2025
This supposition is not adverse to the derivation of species from a common stock, but rather favours the notion that as in the case of the individual the period of plasticity is short compared with that of morphological stability, so if there was such an arboreal branching out of species from a common root, it took place rapidly in conditions as different from ours as those of uterine from extra-uterine life; and that the stage of inflexibility may have been reached before any time of which we have record.
The liquor amnii is secreted into the uterus, as the fetus requires it, and may probably be produced by the irritation of the fetus as an extraneous body; since a similar fluid is acquired from the peritoneum in cases of extra-uterine gestation.
Carried to the extreme, regression leads one in type of thinking and in ideas back to childhood and earliest infancy. The final goal is a state of mental vacuity such as probably characterizes the infant at the time of birth and during the first days of extra-uterine life.
A vegetable secretion and concretion is thus produced on oak-leaves by the gall-insect, and by the cynips in the bedeguar of the rose; and by the young grasshopper on many plants, by which the animal surrounds itself with froth. But in no circumstance is extra-uterine gestation so exactly resembled as by the eggs of a fly, which are deposited in the frontal sinus of sheep and calves.
Hence it continues to grow, whether this fluid, in which it swims, be formed by the uterus or by any other cavity of the body, as in extra-uterine gestation; and which would seem to be produced by the stimulus of the fetus on the sides of the cavity, where it is found, as mentioned before.
Rupture of a gastric or duodenal ulcer; rupture of liver, spleen, or extra-uterine gestation, or abdominal aneurism. Suffocation during an epileptic fit; vomited matter or other material drawn into the trachea or air-passages; croup. Arterio-sclerosis may lead to thrombosis, embolism, or aneurism.
This attachment of the placental vessels to the internal side of the uterus by their own proper efforts appears further illustrated by the many instances of extra-uterine fetuses, which have thus attached or inserted their vessels into the peritoneum; or on the viscera, exactly in the same manner as they naturally insert or attach them to the uterus.
While these principles are clear and undoubted, there are cases in which the right application of them is beset with great difficulties. These often occur in connection with what is called ectopic or extra-uterine gestation, namely, when the nascent human form lodges in some recess not intended by nature for its abode. Of late years, Dr.
When there is no uterus, still fecundation and pregnancy are not impossible, since extra-uterine pregnancies are occasionally observed, that is to say, cases in which the product of conception has escaped the uterus, end proceeded to establish itself in some point of the lower belly.
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