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Updated: May 18, 2025
Is it merely the increasing distension of the uterus by the developing foetus? This could scarcely be the case in the Marsupials in which the foetus when born is quite minute. Nor can we attribute parturition to renewed ovulation, for this occurs in Dasyurus only once a year.
It was not accomplished without love or passion. Love had come quietly, locking them together physically as they had been bonded intellectually. The passion had been deliberately provoked during the proper moment of Laura Holden's cycle of ovulation.
If both were simultaneous, it is reasonable to suppose that conception would be more likely to occur. Ovulation is doubtless more frequently performed in some women than in others. Some women conceive with more or less regularity every fifteen or eighteen months, and others at intervals of several years.
Clarke has pointed out, be followed by paralysis in the ovarian plexus itself, with consequent cessation of ovulation, and amenorrhea, or absence of menstruation. This habitual predominance or irregularity of the ganglionic nerves implies, as has been seen, a relatively deficient innervation or generation of nerve-force in the cerebro-spinal system.
For they mimic and prophesy the events of the last crisis of feminine sex life, the cessation of ovulation which goes by the name of menopause, gonadopause, or change of sex life. The premenstrual phenomena provide a positive film, so to speak, of the latent negative picture of the endocrine system of the girl or woman.
Pain in menstruation, which is much more frequent, is dependent upon other conditions than the activity of the ovaries, and lasts a very much shorter time than does either the function of ovulation, or even than the uterine congestion secondary to it.
It is inevitable, therefore, that the two great functions of parturition and ovulation, of which the latter is peculiar in form, and the former altogether peculiar to the female sex, should assume peculiar importance in all discussions about women inevitable, that to these should be attributed the inferiority of mental calibre or of mental achievement that few care more openly to maintain.
Consciousness of nutritive functions is always painful, and digestion, quite as well as ovulation, may become a process most disturbing to cerebral tranquility and efficiency. The longer duration of the latter is compensated by the more frequent occurrence of the former.
Then heredity of the effect of stimulus took place to some slight degree, and this would occur, according to my theory, only in the presence of the hormone from the ovary in the same condition as that in which the modification was first caused. This would be of course after ovulation, and after hatching of the eggs.
In the specimens of Dasyurus described by O'Donoghue, in which the milk glands developed after ovulation without ensuing pregnancy, normally developed corpora lutea were present in the ovary.
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