无月经

例句：

1. 1. She's been experiencing irregular periods recently.
   她最近一直有不规律的月经。
2. 2. The woman's menstrual cycle is causing her a lot of trouble.
   这位女士的月经周期给她带来了很多麻烦。
3. 3. Many women find it difficult to manage their menstrual cycles during the first few months after childbirth.
   许多妇女在产后最初几个月发现很难管理她们的月经。