Fluctuating asymmetry (FA) and season of birth season are factors that reflect and affect ontogenetic qualities and future development of an organism. The present study was conducted to investigate the degree FA and the effect of season of birth on second and fourth digits lengths and ratio (2D:4D). In this study 1451 subjects (males n= 779 and females n= 672) with mean age 20.64 ± 6.94 and 18.73 ± 6.29. Subjects date of birth, and finger lengths were obtained for the determination of season of birth and calculation FA and 2D:4D ratio. Significant difference was observed in FA with males expressing higher degree of FA in second digit (P=0.001) and fourth digit (P<0.001) but there was no significant difference in the FA of 2D:4D ratio. For season of birth no differences exist in second and fourth digit lengths and 2D:4D ratio of males, but in female significant difference was noticed in right 2D:4D ratio (P=0.02). But when males and females were considered significant differences were obtained in all the parameters studied. This study has revealed that FA is more express in males than females and that season of birth according to Nigeria’s weather pattern did not show the effect expected as seen in four weather seasons (autumn, fall, spring and winter).
