=An interesting change in a girl’s life.=--In the previous talk, we found that God has planned for a most interesting change to take place in a girl’s life. This change from girlhood to womanhood, called puberty, and covering a period of eight years, is brought about by certain changes in the sexual organs. At birth these organs are inactive and remain so until the girl, in this climate, is thirteen or fourteen years of age. In the Southern states it occurs a year sooner. In Central America, puberty comes when the girl is ten and eleven. In Canada this change comes a year later than here. Thus we see that climatic conditions either hasten or retard this change. In climates where puberty is delayed to the fourteenth and fifteenth years, girls are healthier, more energetic and live longer than in warm climates. This would indicate that the longer puberty is delayed in a girl’s life, if she is otherwise healthy, the better for her. If the girl keeps company with wild girls, enjoys obscene jokes, reads cheap novels, entertains impure thoughts or handles her sexual organs, she may cause puberty to come on six months sooner than it naturally would come--a misfortune indeed for her. In a few girls, especially those who develop rapidly, puberty may occur in the eleventh year. =Signs of puberty.=--During this period of puberty, or adolescence, which usually lasts for eight years, she is changing from a girl to a woman. This is one of the most important events in a girl’s life. The approach of this period is usually heralded by an uneasy feeling in the small of the back, heaviness about the ovaries, sometimes by headaches and possibly by pains in other parts of the body. One of the ovaries has formed a little egg or ovum. A flow of mucus tinged with blood, formed by the mucous membrane of the womb, passes from the body by way of the vagina. This usually lasts about four days. Meanwhile the ovum is conveyed by the fallopian tube to the womb where, after the flow has ceased, it remains several days, before passing from the body by way of the vagina. =Menstruation.=--The discharge is called the menstrual fluid. If the girl is healthy, this will occur once each lunar month, or every twenty-eight days. It is for this reason that the flow is called menstruation. This word comes from the Latin word “mensis,” meaning a month. This monthly experience is known by several names, “Menses,” “periods,” “courses,” and “unwell.” The doctors use the term “Menses,” and this is doubtless the best one to use.