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Acute maternal TCDD exposure modifies nuclear position in interphase blastomeres. Eight-cell embryos were collected from control and exposed (50 ng/kg of 1 μg/kg of TCDD) female rats, and interphase blastomeres (n = 48 blastomeres for each group) were assessed for the position of nuclei in relation to the basal domain of the cell. Asterisks (*) indicate a significant difference compared to controls (P < 0.05).
