The synthesis of estrogen is catalyzed by aromatase.The female chicken gonads can develop into male when the activity of aromatase is blocked by aromatase inhibitor(AI) before sexual differentiation.

• 在性分化前用芳香化酶抑制剂（AI）阻断芳香化酶的活性，以抑制雌激素的合成，雌性鸡胚的性腺则可发育成为雄性。