The Key to Sex Control; Or, the Cellular Determination of Sex and the Physiological Laws Which Govern Its Control

The Key to Sex Control; Or, the Cellular Determination of Sex and the Physiological Laws Which Govern Its Control

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1911 edition. Excerpt: ...By the term menstruation is meant the monthly hemorrhage which takes place in the uterus during the child-bearing period of the normal woman, except during pregnancy and lactation, when it is usually suspended. Menstruation is the only guide to the control of sex and for that reason each and every phase of the phenomenon should be thoroughly understood. Puberty.--The first occurrence of menstruation with the concomitant changes marks the epoch of sexual maturity at which, in the female, impregnation becomes possible. The signs (as Parvin gives them) are: " The girl's pelvis enlarges and her breasts notably increase in size as she enters this period of life; the one change indicates preparation for childbirth, the other provision for the nourishment of the newborn. The external genitals are developed, and hair grows upon the mons veneris and upon the labia majora; the circumference of the neck is greater, and the voice changes; the body is fuller and more gracefully rounded; sharp, irregular, and angular outlines are replaced by symmetrical curves, and new beauty of form and of general expression is 1nanifested--it is the springtime of female life, the bud unfolding into the flower. The girl passing into womanhood puts away childish things, turning from frivolous amusements, from toys and plays, or from rude sports in which she has found pleasure; she enters a new life, has new thoughts, desires, and emotions. Hitherto she has been living solely in and for the present; but now the future with its lights and shadows, its hopes and fears, makes a large part of her life. She is more sensitive and reserved, and manifests a modest dignity, giving and expecting respect; her individuality becomes more manifest, her sense of duty stronger, more

Product details

  • Paperback | 52 pages
  • 189 x 246 x 3mm | 109g
  • United States
  • English
  • black & white illustrations
  • 1236805682
  • 9781236805683