The theory is an attractive one since it relates well with the biochemical cycles of the human body, especially the menstrual cycle in women. There is considerable empirical validation for claims made for biorhythm. The theory was discovered by Dr. William Fleiss of Germany. Since body cycles relate to birth dates, the system of biorhythm is analogous to medical astrology. Many doctors use it in diagnostic work.
Businesses use it in predicting future productivity and earnings.
Even football games have been predicted by the use of biorhythm. It is said that both Judy Garland and Marilyn Monroe committed suicide on critical days. The Omi Railway in Japan achieved an accident-free safety record with the use of biorhythm. Some 5000 other Japanese companies also employ biorhythm as well as European airlines and transportation systems in other companies.