Amenorrhea is medically significant when the first menstrual cycle has not occurred after age 16 or when the absence of a period is not related to menopause. Dysmenorrhea is one of the most frequent gynecologic disorders. Hormonal imbalance may be the cause as well as more serious diseases and disorders. Analgesics and NSAIDs are usually sufficient for relieving the pain. (Diseases of the Human Body) ??注釋： ??amenorrhea (美式); amenorrhoea (英式) /??m?n??ri??; e??m?n??ri??/ 閉經(jīng)；無月經(jīng) ??medically /?m?d?kl?/ 醫(yī)學(xué)上(地)；醫(yī)藥上(地) ??significant /s?ɡ?n?f?k?nt/ 重要的；有重大意義的；顯著的 ??menstrual cycle /?m?nstr??l ?sa?k(?)l/ 月經(jīng)周期 ??period /?p??r??d/ 月經(jīng)；經(jīng)期；例假 ??menopause /?m?n?(?)p??z/ 更年期；絕經(jīng)期；絕經(jīng) ??dysmenorrhea (美式); dysmenorrhoea (英式) /?d?sm?n??r??/ 痛經(jīng) ??disorder /d?s???d?/ 疾?。皇д{(diào)；紊亂? ??hormonal /h???m??n?l/ 荷爾蒙的；激素的 ??imbalance /?m?b?l?ns/ 失衡；不平衡；不均衡 ??analgesic /??n?l?d?i?z?k/? 止痛藥；鎮(zhèn)痛藥；鎮(zhèn)痛劑；鎮(zhèn)痛的 ??NSAID /??ns?d/ 非甾體抗炎藥(non-steroidal anti-inflammatory drug) ??relieve? /r??li?v/ 減輕；緩解；緩和