月经来潮

例句：

1. 1.She's been experiencing menstruation for the past few months.
   她过去几个月一直在经历月经。
2. 2. The menstrual cycle is a natural part of a woman's life.
   月经周期是女性生活自然的一部分。
3. 3. Many women find it difficult to cope with menstruation during their period.
   许多女性在经期时发现很难应对。