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These ductless glands, as we know, liberate into the blood what are termed "hormones," or chemical messengers, which have a complex but precise action in exciting and developing all those physical and psychic activities which make up a full life alike on the general side and the reproductive side, so that their balanced functions are essential to wholesome and complete existence.
Or, a few may be completed and laid, as is often seen in the case of caged female canaries. But these eggs of course could never hatch. They are perfect so far as the ovum is concerned, but lacking fertilization they cannot continue their development. Another question often asked, and of peculiar meaning, is, "If the reproductive system be not exercised, will it not perish for lack of exercise?"
But this improvement is not for the sake of these vegetative functions. Brain and muscle demand vastly more fuel, and produce vastly more waste which must be removed. At almost the close of the series the reproductive system undergoes a modification which is almost revolutionary in its results.
It is a beautiful fact that the plant world offers illustrations of all the underlying phenomena of the reproductive life, and that through the flowers the little one can get his first introduction to the great subject.
"The wailing is for the plants; the first lament is they grow not. The wailing is for the barley; the ears grow not." The reproductive energies of the animal kingdom are suspended "For the habitation of flocks it is; they produce not. For the perishing wedded ones, for perishing children it is; the dark-headed people create not."
A girl cannot spend more than four, or, in occasional instances, five hours of force daily upon her studies, and leave sufficient margin for the general physical growth that she must make in common with a boy, and also for constructing a reproductive apparatus. If she puts as much force into her brain education as a boy, the brain or the special apparatus will suffer.
No one expects that all the features of the now existing organisations will be absolutely repeated in an entirely new class of life. The reproductive system of animals differs widely from that of plants, but both are reproductive systems. Has nature exhausted her phases of this power?
All that she needs to know about the proper care of her person should be told her in the most considerate yet explicit manner, as should whatever is told her upon any part of the subject. It is a mistake to be vague now. Whatever is told concerning the reproductive processes should be said with the greatest clearness, leaving no room for brooding and imagination.
It is necessary to ovulation, and to the integrity of every part of the reproductive apparatus; it also serves as a means of elimination for the blood itself.
As yet the restorative changes in the reproductive organs have not been completed, but one may definitely say by this time whether or not they will culminate in a satisfactory manner. Besides, making the examination while the changes are in progress sometimes enables the physician to treat approaching complications before they actually develop.
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