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Updated: May 2, 2025
It is true that, in these experiments, as in a former observation of the same physiologists, it was the already formed foetus that was influenced by the toxins. But other researches of Charrin have resulted in showing that the same effect may be produced, by an analogous process, on the spermatozoa and the ova.
Under ordinary conditions this obstruction must seriously interfere with the entrance of the spermatozoa into the cavity of the uterus, and renders the former theory, recently revived by Bossi, quite tenable, that impregnation is most likely to occur just after the menstrual epoch. The vaginal secretion under certain pathologic conditions may become so acid that it induces sterility.
The testes attain their maximum size during the breeding season end of March or beginning of April. At this time each organ is almost as large as a pigeon's egg, is very soft, and the liquid exuding from it when cut is swarming with spermatozoa. The bird is of course in full nuptial plumage.
We must then look upon the internal secretion as composed of the liquid elements of the testicular secretion. So far as physiologists know at present, the external secretion differs from the internal secretion only in possessing spermatozoa.
The male is concerned only with copulation and fertilization of the ovum by the spermatozoa, while the female must protect and nourish the embryo and foetus until it has become sufficiently developed to live independently of the protection and nourishment afforded it within the womb. When the final stage of gestation is reached, birth or the act of parturition occurs.
The eggs and spermatozoa of two such individuals might not infrequently unite, and thus in time the two characteristics be inherited by a large fraction of the species. And now let me quote from Mr.
"What is it that binds me to her?" he reflected, imagining himself to be on the edge of a divine mystery, and never expecting that he and Christine were the huge contrivances of certain active spermatozoa for producing other active spermatozoa. Christine did not wonder what bound her to G.J. She knew, though she had never heard such a word as spermatozoa.
If the nocturnal emission does not occur, the sexual desires are certain to return to occupy the waking hours more or less completely. If the nocturnal emission does occur, it will carry away not alone the vesicular secretion, but also more or less of the nascent spermatozoa and other constituents of the vital fluid.
The milk tubules from the different portions of the gland converge and form larger tubules that finally empty into small sinuses or reservoirs at the base of the teat. Leading from these sinuses are one or several milk ducts that open at the summit of the teat. The testicles are the glandular organs that secrete the spermatozoa, the essential elements of the seminal fluid.
When hyperacidity of the vaginal secretion is present, it is probable that the fertilizing element is at once rendered inert; but should some of the spermatozoa succeed in reaching the interior of the cervical canal, the increased alkalinity of the secretion there would in all probability put an end to all further progress.
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