text: This study has a number of limitations and there are a number of points to consider when interpreting the results:
  This study did not follow women during pregnancy and assess the water they drank; instead it estimated women’s exposure to THMs depending on where they lived. They had no information about what each woman drank during her pregnancy, or about other possible exposures to chlorination by-products, for example, by swimming or bathing. Therefore, the estimates of THM exposure may not be reliable.