Table 7.

Concentration of minerals in amniotic fluid according to week of the pregnancy (μgL⁻¹)

Minerals	Mg	Al	Cu	Co	Ni	As	Sr	Cd	Ba	V	U	Cr	Mn
16–20 (n = 19)
Mean ± SD	8648.33 ± 1913.16	110.94 ± 90.13	75.05 ± 17.03	0.21 ± 0.06	3.10 ± 3.03	4.14 ± 2.00	20.61 ± 6.73	0.05 ± 0.04	3.70 ± 7.87	7.90 ± 2.89	0.04 ± 0.03	1.16 ± 1.73	3.85 ± 2.35
Median	9383a	96.4	82.64a	0.22	2.54	3.91	21.31	0.04	0.25	8.70	0.03	0.2	3.57
21–26 (n = 20)
Mean ± SD	7581.09 ± 1887.31	160.46 ± 141.79	115.16 ± 60.13	0.23 ± 0.11	4.77 ± 4.76	4.02 ± 2.07	29.39 ± 20.90	0.07 ± 0.06	6.40 ± 8.92	7.52 ± 3.11	0.04 ± 0.03	1.87 ± 2.19	6.52 ± 6.03
Median	8287b	114.79	97.55b	0.20	3.96	3.6	23.65	0.06	0.25	7.02	0.03	1.44	5.65

^{a, b}significantly different, Mann–Whitney’s test, p < 0.01