1 Biomarkers - specificities & discussions - 2 Biomarkers & effects case studies, examples, summary Pollutants & reproductive processes 3 Regulation of reproduction Regulation of reproduction Retinoid metabolism & PCDDs Variation of retinoid levels at different localities 4 Immunotoxicity of xenobiotics Immunotoxicity of xenobiotics Xenobiotics and thyroid regulation Xenobiotics and thyroid parameters 5 Xenobiotics (non-AcChE) and neurotoxicity Biomarkers = neurotransmitter levels