“…Early investigations by Jacobi (1861), Pierce (1877), Herrman (1913), andBoas (1927), as well as more recent ones by Doering and Allen (1942), Sandler (1944), Falkner (1957), Tegzes (1960), Lysell et al (1962, Bailey (1964), Roche et al (1964), Barrett and Brown (1966), McGregor et al (1968), Friedlaender and Bailit (1969, Bambach et al (1973), Billewicz et al (1973), Brook and Barker (1973), Robinow (1973), and Nystrom (1977) have failed to report sexual differences, whereas others have reported a slight advance for some teeth in boys (Robinow et al, 1942;Meredith, 1946;Ferguson et al, 1957;Leighton, 1968;Burdi et al, 1970;Boutourline and Tesi, 1972;Infante, 1974;and Taranger et al, 1976) or the reverse trend (Boas, 1927;Garn et al, 1958;Senecal et al, 1959;and Nanda, 1960).…”