premenstrual phase

例句：

1. 1. During the premenstrualphase, women often experience mood swingsand irritability.
   在经前阶段，女性常常经历情绪波动和易怒。
2. 2. The premenstrual phase isa crucial period for women's health.
   经前阶段是女性健康的关键时期。
3. 3. Manywomen find that managing their stress during thepremenstrual phase can help alleviatesymptoms of PMS.
   许多女性发现，在经前阶段管理压力可以帮助缓解PMS的症状。