Schenk's Theory: The Determination of SexSchenk, Samuel Leopold
Science
Schenk's Theory: The Determination of Sex
Schenk, Samuel Leopold
Sex determination, Genetic; Sex preselection
I numbered amongst my acquaintances a family, of whom, in the course
of years, I was acquainted with the grandmother, a daughter, and two
grand-daughters. The grandmother had, including the third generation,
fifteen descendants, of whom twelve were girls and three were boys.
Two of the boys were the sons of the grandmother, and the first two
children she had borne. She was under medical treatment, and the
analysis of the urine showed a considerable quantity of sugar. She had
six daughters. One of these daughters, who survived the others, had
five children, amongst them one boy, who soon died.
Two of the grand-daughters of this family became mothers, each bearing
one daughter. I had the opportunity of examining the urine of all the
mothers of this family, and always found sugar in it. Sometimes the
saccharine contents reached a remarkable quantity, and yet were not
such as could be diagnosed to indicate an unhealthy condition.
Amongst the acquaintances of my youth was a young lady of good family.
Carefully reared, she was, as a child, too much sheltered from the
influences of the open air, and in later years much imprisoned in-doors
by hard study in different branches of art and science. As a young lady
she was fairly tall and well nourished, but pale and possessed of
little color.
It happened that I had an opportunity of examining this young lady’s
urine. As I found a considerable quantity of sugar, I was led to the
conclusion that the girl (she was engaged) would have principally
female offspring.
Many years had elapsed. The young lady had ripened into a stately
matron, and told me that she had the happiness to be the mother of five
daughters and a son. I am altogether without the statistics necessary
to deduce from a great number of similar cases the average relative
number of the sexes born of women suffering from diabetes. But this
must be pointed out, that, notwithstanding the high percentage of sugar
excreted in the case of women suffering from pronounced diabetes,
female offspring do not necessarily always appear. They will probably
be in a very striking majority when compared with the males, but the
complete disappearance of the male sex is not to be anticipated,
because male individuals, though in the minority, can appear. And this
was to be anticipated, seeing that in the so-called slighter cases of
this complaint the abnormal metabolism can be sensibly improved by
attention to diet.
* * * * *
Diabetes amongst women has a marked influence upon the functions of the
sexual organs. Thus, for example, the menses cease, a condition which,
according to gynæcologists, is occasioned by an abnormal condition of
the womb and of the ovaries which become atrophied. (Schauta.) On the
other hand, diabetes may also result from diseases of the reproductive
organs. (Imlach.) When the cause of the complaint is removed from the
female genitals the sugar also disappears from the urine.
Public-domain text, read in full here on John Shaqi.
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