irregular menstrual period
常见例句
- However, if your menstrual cycle frequently occurs more often than every 21 days or less often then every 35 days, or if a period is missed altogether, your cycle can be considered irregular.
然而，如果經期時常不足21天或超過35天，或整個周期完全不出現，則可以認定爲不槼則。
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