Fig. 1.

Gonadal differentiation in embryos exposed to E2 or PPT. (A–D) Representative cross-sections of HE stained gonads at stage 26 for the control male (A), control female (B), E2-exposed male (C) and PPT-exposed male (D). Control testis showing well-developed seminiferous tubules (*); the control ovary shows thicker cortex (#) and lacunae structure (arrowheads). Gonads from E2-and PPT-exposed males did not form seminiferous tubules or similar characteristics to the control ovary. Scale bar = 100 μm.