There are many ways in which the hymen may be destroyed apart from coitus. Among the Chinese (and also, it would appear, in India and some other parts of the East) the female parts are from infancy kept so scrupulously clean by daily washing, the finger being introduced into the vagina, that the hymen rapidly disappears, and its existence is unknown even to Chinese doctors. Among some Brazilian Indians a similar practice exists among mothers as regards their young children, less, however, for the sake of cleanliness than in order to facilitate sexual intercourse in future years. (Ploss and Bartels, _Das Weib_, vol. i, Chapter VI.) The manipulations of vaginal masturbation will, of course, similarly destroy the hymen. It is also quite possible for the hymen to be ruptured by falls and other accidents. (See, e.g., a lengthy study by Nina-Rodrigues, "Des Ruptures de l'Hymen dans les Chutes," _Annales d'Hygiène Publique_, September, 1903.) On the other hand, integrity of the hymen is no proof of virginity, apart from the obvious fact that there may be intercourse without penetration. (The case has even been recorded of a prostitute with syphilitic condylomata, a somewhat masculine type of pubic arch, and vulva rather posteriorly placed, whose hymen had never been penetrated.) The hymen may be of a yielding or folding type, so that complete penetration may take place and yet the hymen be afterwards found unruptured. It occasionally happens that the hymen is found intact at the end of pregnancy. In some, though not all, of these cases there has been conception without intromission of the penis. This has occurred even when the entrance was very minute. The possibility of such conception has long been recognized, and Schurig (_Syllepsilogia_, 1731, Section I, cap. VIII, p. 2) quotes ancient authors who have recorded cases. For some typical modern cases see Guérard (_Centralblatt für Gynäkologie_, No. 15, 1895), in one of whose cases the hymen of the pregnant woman scarcely admitted a hair; also Braun (ib., No. 23, 1895).