Effect of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) on steroid concentrations in blood and gonads of chicken embryo

► TCDD affects steroid concentrations in blood during chicken embryogenesis. ► Exposure to TCDD modifies gonadal steroidogenesis in newly hatched chickens. ► Dioxins exert an effect on embryo development and hatching process.