n.初潮（少女的第一次月经来潮）

The average age for the onset of menarche in developed countries is around 12 years old.
在发达国家，女性初潮（月经来潮）的平均年龄约为12岁。
Menarche marks the beginning of a girl's reproductive life.
初潮标志着女孩开始进入生育期。
A healthy diet and regular exercise can influence the timing of menarche.
健康的饮食和规律的运动可以影响初潮来临的时间。
In some cultures, menarche is celebrated as a significant rite of passage.
在某些文化中，初潮被视为重要的成长仪式并会进行庆祝。
Girls with early menarche may be at a higher risk for certain health issues later in life.
早初潮的女孩在生活中可能面临某些健康问题的风险更高。
Late menarche could be an indicator of delayed growth or hormonal imbalances.
晚初潮可能是生长延迟或激素失衡的一个标志。
Studies have found that obesity can lead to earlier menarche in young girls.
研究发现肥胖可能导致年轻女孩提前出现初潮。
Nutrition plays a critical role in determining the age of menarche.
营养在决定初潮年龄上起着关键作用。
Psychological stress has been linked to irregularities in the timing of menarche.
心理压力与初潮时间的不规律有关联。
It's important to educate young girls about menarche so they understand it's a normal biological process.
教育年轻女孩关于初潮的知识很重要，以便她们理解这是一个正常的生理过程。