Amenorrhea; Gonadal steroid hormones; Diagnosis differential.
闭经；性腺甾类激素；诊断，鉴别。
It has been well-known that gonadal steroid hormones, estrogen especially, plays an important role in protecting the brain from neurodegenerative processes, including Parkinson's disease (PD).
大量研究业已揭示，性腺类固醇激素尤其是雌激素在神经系统退行变性性疾病如帕金森病（PD）中具有神经保护作用。
It has been well-known that gonadal steroid hormones, estrogen especially, plays an important role in protecting the brain from neurodegenerative processes, including Parkinson's disease (PD).
大量研究业已揭示，性腺类固醇激素尤其是雌激素在神经系统退行变性性疾病如帕金森病（PD）中具有神经保护作用。
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