Читать книгу The Mother and Her Child - Lena K. Sadler - Страница 33

ROLE OF THE PLACENTA

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By the end of the third month, the "cocoon" attachment described in chapter two has disappeared; the fetus is slowly pushed away from the uterus which has so snugly held it for more than eleven weeks; while upon the exact site of its previous attachment the thickened uterine membrane undergoes a very interesting and important change—definite blood vessels begin to form—which begin indirectly to form contact with the maternal vessels, and thus it is that the placenta, or "after birth" is formed; and then, by means of the umbilical cord, nourishment from the mother's blood-stream is carried to the growing and rapidly developing child. In exchange for the nourishing stream of life-giving fluid by which growth and development take place, the embryo gives off its poisonous excretions which are carried back to the placenta, from which they are absorbed into the veinous circulation of the mother; so, while the mother does, through the process of nutrition, influence growth and development in the embryo, she is wholly unable to produce specific changes and such definite developmental errors as birthmarks and other deformities.

Just as truly as it would be impossible so to frighten a setting hen as to "mark" or otherwise influence the form or character of the chicks which would ultimately come forth from the eggs in her nest, it is just as truly impossible to frighten the pregnant mother and thereby influence the final developmental product of the human egg which is so securely tucked away in its uterine nest; for, when conception has occurred, the human embryo is just as truly an egg—fashioned and formed—as is the larger and shell-contained embryo of the chick which lies in the nest of the setting hen.

And so we are compelled to recognize the fact that there is little more danger to the unborn child when the mother is frightened than when the father is scared. The one contributes as much as the other to the general character of the child, while neither is to blame for development errors and defects.

The Mother and Her Child

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