irregular menstrual cycle

例句：

1. 1.She has an irregular menstrual cycle, which causes her to miss several days of work.
   她有一个不规则的月经周期，这导致她错过了几天的工作。
2. 2.The doctor advised her to get regular check-ups to manage her irregular menstrual cycle.
   医生建议她定期检查以管理她的不规则月经周期。
3. 3. Due to her irregular menstrual cycle, she often feels tired and bloated during her period.
   由于她的不规则月经周期，她经常在经期感到疲劳和胀气。