menstrual age

例句：

1. 1.The menstrual age is a crucial factor in determining fertility.
   月经年龄是决定生育能力的关键因素。
2. 2. She was diagnosed with polycystic ovary syndrome (PCOS) at the age of 30, which can affect menstrual age.
   她在30岁时被诊断出多囊卵巢综合症
3. 3. Researchers have found that the menstrual age can be influenced by various factors such as diet and lifestyle.
   研究人员发现，月经年龄受到饮食和生活方式等多种因素的影响。