Young men who have previously suffered from gonorrhœa and who wish to marry, must, unless they wish to cause unspeakable misery, undergo an exact and thorough examination; not only must the physician inquire as to the presence of certain symptoms, such as smarting during micturition, adhesion of the lips of the urethral meatus, “clap-threads” in the urine, etc., but during a considerable period of time repeated microscopical examinations of the urine must be undertaken, and the filaments, if present, must be examined for gonococci. The physician will also have to determine whether any vestiges remain of epididymitis, and whether the quality of the semen has been impaired by the attack of gonorrhœa. Unfortunately, it is not yet within our power absolutely to forbid marriage to a man exhibiting all the symptoms of chronic gonorrhœa; but it is the duty of the physician to explain to such a man the scientific views regarding this matter that now prevail, in order to furnish him with the grounds for a decision. It is not possible, when discussing the hygiene of married life, to preserve silence respecting the extremely pressing question of the use of measures for the prevention of conception, for in recent years their use has become extraordinarily general, chiefly, indeed, in the upper and middle classes of society, but to some extent also among the working-class population. Although we devote a special chapter to this topic, we must here express the opinion that, except in certain instances in which their employment can be justified on carefully weighed and well-established medical grounds, the use of any mechanical or chemical means for the prevention of conception must be discountenanced as injurious to health. The wife who wishes to preserve her psychical purity and moral chastity, which is not only possible in marriage but also greatly to be desired, must not concern herself much with the technique of the sexual life, but must give herself up to sexual enjoyment only as the result of a delicate and immediate bodily and mental desire. Not only for reasons of national economy regarding the means of providing for the family, but also for well-grounded personal reasons regarding the wife’s health, must the latter be spared an unduly rapid succession of pregnancies and confinements. And this should be effected by a certain degree of continence and by the observation of extensive periods of sexual quiescence.