Thus far, this book has explored the links between formaldehyde exposure and general toxicity, as well as links between formaldehyde exposure and cancer. However, formaldehyde also poses a significant threat to reproductive and developmental health. Using new criteria and a unique approach to literature-based methods, an up-to-date meta-analysis of formaldehyde exposure and reproductive/developmental toxicity was conducted, which marked a departure from previous conclusions on the same subject. The findings provide evidence that maternal formaldehyde exposure is associated with spontaneous abortion and other adverse pregnancy outcomes.