Okay, the user wants me to translate "mimicking estrogen" into Traditional Chinese. Let me check the rules again. The first rule says to translate all content into Traditional Chinese. The second rule states that if the content is already in Traditional Chinese, output it unchanged. The third rule is to provide only the translation result with no explanations.
So, the input here is "mimicking estrogen". Since it's in English, I need to translate it. The term "mimicking" can be translated as "模擬" or "模仿". "Estrogen" is "雌激素" in Traditional Chinese. So putting it together, "mimicking estrogen" would be "模擬雌激素" or "模仿雌激素". I should check which term is more commonly used in medical contexts. "模擬" might be more technical, while "模仿" is more general. But since the user didn't specify the context, I'll go with the direct translation. Also, ensuring that there are no spaces and it's properly formatted. The user wants only the translation, so no explanations. Let me confirm once more that the input isn't already in Traditional Chinese, which it isn't. So the correct translation should be "模擬雌激素".