Frequently recurring pregnancy and childbirth may, according to _Krönig_, act as the predisposing cause in the production of neurasthenia. In regard to hysteria also we must admit that the onset of some disease of the organs of generation frequently leads previously latent hysteria to manifest itself openly, and further we have to recognize that diseases of the reproductive system often give the clinical picture of hysteria a quite distinctive coloration; the physiological course of the functions of the generative organs is also competent to produce both of these effects. _Krönig_, however, rejects the view that the lack of sexual intercourse has an unfavorable influence upon the nervous system in women, and gives rise to hysterical and neurasthenic disorders. The favorable influence which marriage is often observed to exercise upon the course of nervous disorders is explicable with reference to psychical considerations of a very different nature. Sexual abuses, masturbation, and the use of preventive measures, give rise in women far less often than in men to neurasthenic and hysterical conditions. _Féré_ asserts that in certain neurasthenic patients sexual intercourse induces a general blunting of the senses, and especially of hearing and sight. Actual amaurosis of short duration may even be observed; also cutaneous anæsthesias, paralytic conditions of the extremities taking the form either of hemiplegia or paraplegia, convulsive attacks, and somnolent paroxysms. _Delasiauve_ observed that epileptic patients, who during residence in an asylum had remained almost entirely free from fits, after returning home and resuming sexual intercourse, even in strict moderation, suffered from a recrudescence of the convulsive seizures; when intercourse was excessive, the relapse was naturally even more severe. In two instances, in women who in a single night had practiced intercourse to very great excess, _Hammond_ observed paralysis of both legs to ensue; he saw also in numerous cases spinal irritation and other nervous disturbances as a consequence of sexual excesses. _Von Krafft-Ebing_ points out, with reference to the prophylactic influence of marriage in respect of mental disorder, that in men early marriage diminishes the danger of the occurrence of such disorder, whereas in women marriage is undesirable before the attainment of complete physical maturity.