The causation of sex in man : a new theory of sex based on clinical materials together with chapters on forecasting or predicting the sex of the unborn child and on the determination or production of either sex at will / by E. Rumley Dawson.

  • Dawson, E. Rumley (Ernest Rumley), -1918.
Date:
1917
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Licence: In copyright

Credit: The causation of sex in man : a new theory of sex based on clinical materials together with chapters on forecasting or predicting the sex of the unborn child and on the determination or production of either sex at will / by E. Rumley Dawson. Source: Wellcome Collection.

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    occurrence in families of an equal number of children of each sex, irrespective of the order of their birth. Thus, from many of my patients and friends the following cases will support this statement: Mrs. K. H. B. had 8 Mrs. B. G. „ 8 Mrs. P. , ,, 7 Mrs. L. K. ,, 7 Mrs. B. D. R. ,, 6 boys and 8 girls. O ? > > > ^ y y n y y / y y yy y yy ,, 6 „ Mrs. F. K., Mrs. G. S., Mrs. C., Mrs. P. G. G., Mrs. C. G., Mrs. A., Mrs. R., Mrs. K. V., and Mrs. M. all had ten children, five of each sex. These cases go to prove that the two ovaries settle the sex, and that each sex is equally likely to occur with the slight preponderance of males (io6 to loo) due to the slightly larger right ovary. These cases also should disprove such theories of sex causation as relative age and vigour of parents, as neither age nor vigour can be supposed to change about so as to allow an equal number of children of both sexes to be born. I have the names and particulars of many other families of eight children, four of each sex, and of six and four show- ing sexes equally divided; but I have only included the more numerous families, to show it was no coincidence. If, instead of both ovaries being active, only one ovary is active, the other being functionless or absent—that is. Unilateral Sterility—we get all the children borne by that woman of the same sex, because ova of only one side, and therefore one sex, are provided. Unilateral Sterility.—There are several reasons to account for the inactivity of one ovary, or Unilateral Sterility, as I have elsewhere called it. The CHIEF CAUSE of this sterility of an ovary is an in- flammatory one. Very frequently after a confinement some inflammatory mischief sets in round about the uterus, or round one or other Fallopian tube or ovary, and leads either to the tube being obliterated or bound down, or the