Maternal serum concentrations of mixtures of PCB-153, <i>p,p’</i>-DDE and HCB during early pregnancy (around gestational week 14), and the risk for hypospadias among their infants.

<p>Odds ratios (OR) and 95% confidence intervals (CI) were obtained with conditional logistic regression analysis.</p>a<p>Low = children whose mothers had exposure concentrations in the lowest quartile for all exposure variables, High = children whose mothers had exposure concentrations in the highest quartile for all exposure variables, and Medium = all other.