Physically, however, the body is quite able to completely regenerate itself as it approaches old age. Indeed, a quite legitimate second puberty is possible, in which the male's seed is youthfully strong and vital, and the woman's womb is pliable and able to bear... Now, to some extent there is a connection between this innate, rarely observed second puberty and the development of cancer, in which growth is specifically apparent in an exaggerated manner.
Session 770, Page 66 - The Nature of the Psyche: Its Human Expression, (1979)