The odds ratios for spontaneous abortion in five blood lead levels (5–9, 10–14, 15–24, 25–39, and ≥40 μg/L) were 1.58 (0.23–10.90), 3.13 (2.11–9.08), 4.63 (1.45–14.83), 6.33 (1.95–20.56), and 22.56 (4.91–103.66), respectively, indicative of a significant trend (P1 = 0.64, P2 = 0.02, P3 = 0.01, P4 = 0.02, and P5 = 0.00) ( 38 ).
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Heavy metals and metalloids exposure and <i>in vitro</i> fertilization: Critical concerns in human reproductive medicine.
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