“…Furthermore, in group II and in subgroups A, B and C; no significant correlations exist between the number of deliveries and serum Zn concentration. Serum Zn is the most widely used index of Zn status in human (WHO, 2001;Angelova et al, 2006;WHO et al, 2007).In this study serum Zn concentration among apparently healthy non-married women showed a normal distribution pattern (Fig. 2) with the reference range (X ± 2SD) of 9.78-14.41 µmol/L which lower than the international reference range of 11.6-23.0 µmol/L obtained by atomic absorption spectrometry method (Akl, 2001).This is probably due to the relatively small sample size used in this study, in addition although the atomic absorption spectrometry method offer greater sensitivity with good analytical parameters and accuracy (Angelova et al, 2006), but it is tedious and subject to numerous interferences (WHO, 2001) and variation in the laboratory estimations (Pathak et al, 2008).…”