“…Distribution of cases by the relation the onset of symptoms bears to menarche proves the occurrence of a group in which the disease makes its appearance in direct connection with menarche (p. 53), i. e. during a period characterized by the bleeding5 being to a considerable extent physiologically anovular (v. MIKULICZ-RADECKI and KRAUSCH, 1935;NOVAK, 1947, and many others). A second and considerably higher frequency peak is found in the ages immediately preceding menopause (p. 54), hence once again during a period in which anovulation is a common phenomenon (TIETZE, 1934;NOVAK, 1945NOVAK, , 1946HAMBLEN, 1945, et d.). Besides these two anovulatoiy periods there occurs, as was shown earlier in this chapter, another one that has a similar physiological anovulation during the fertile age of the woman, viz.…”