href="@public@vhost@g@gutenberg@html@files@19924@[email protected]#chapa59" class="pginternal" tag="{http://www.w3.org/1999/xhtml}a">Changes which occur at puberty—Menstruation—Nature of menstruation—A critical period—Important hints—Menorrhagia—Dysmenorrhoea—Amenorrhoea and chlorosis—Hysteria—Prevention better than cure—Extra-uterine pregnancy—Twins—Monsters—Hybrids—Law of sex—Heredity—Ante-natal influences—Law universal—A source of crime—Circumcision—Castration

Sexual precocity—Astonishing ignorance—Inherited passion—Various causes of sexual precocity—Senile sexuality—Marriage—Time to marry—Application of the law of heredity—Early marriage—Mutual adaptation—Disparity of age—Courtship—Long Courtships—Flirtation—Youthful flirtations—Polygamy—Polyandry—Divorce—Who may not marry—Do not be in a hurry

Mental unchastity—Amativeness—Unchaste conversation—Causes of unchastity—Early causes—