Body length at NOS Partial correlation coefficients P-value All infants (N=498) Male (N=267) Female (N=231) All infants (N=498) Male (N=267) Female (N=231) Mercury -0.017 -0.061   0.008 0.708 0.323 0.901 HCB -0.128** -0.165** -0.100 0.004 0.008 0.133 b-HCH -0.096* -0.133* -0.014 0.032 0.031 0.840 PCB-118   0.025 -0.021   0.060 0.574 0.735 0.372 PCB-153 -0.072 -0.127* -0.009 0.108 0.039 0.890 PCB-138 -0.049 -0.109   0.023 0.274 0.079 0.729 PCB-156 -0.073 -0.150*   0.018 0.104 0.015 0.784 PCB-180 -0.038 -0.100   0.024 0.397 0.106 0.719 2 x sum of PCB (138+153+180) -0.058 -0.117   0.009 0.189 0.059 0.894 Sum of PCB (138+153+156) -0.064 -0.122*   0.005 0.158 0.049 0.936 Sum of three mono-ortho PCB (105+118+156) -0.017 -0.063   0.029 0.705 0.109 0.660 4,4’-DDT -0.097* -0.089 -0.130* 0.032 0.153 0.050 4,4’-DDE -0.115* -0.140* -0.107 0.011 0.024 0.107 Trans-nonachlor      -0.050 -0.046 -0.046 0.264 0.454 0.496 *   : Significant correlation (2-tailed significance) ** : Highly significant correlation (2-tailed significance)