On the basis of present investigations, namely on account of the hydroxyproline determinations and the biomathematical analysis of data, the ageing of the human Fallopian tube with regard to its collagen content can be characterized as follows: Collagen concentration of the oviduct increases slightly and almost linearly up to the 5th decade of woman life. In the 2nd half of the fifth decade, i.e. already in the premenopausal years, this increase is accelerated, then changing into a yet almost linear but stronger rise of the collagen content.