“…Studies conducted in the U.S.A. (Chopra, 1953) and data from Japan (Matsunaga, 1956) that parents without this characteristic had eight children with MPH suggested that there were exceptions to this rule, indicating that the hypothesis of heredity was not completely satisfactory and that further studies were necessary. 1939), Tibetan (Tiwari and Bhasin, 1969), Japanese (Matsunaga, 1956), Malaysian (Dharap et al, 1995); as well as the African population in Nigeria (Singh, 1982;Mbajiorgu et al, 1996), Ethiopian (Bat-Miriam, 1962) and American (Setty, 1966). Analyses of the characteristic in various populations have demonstrated significant differences (Sethuraman et al, 1982).…”