In Western countries, the average age for menarche has declined about three months per decade over the past 100 years. This relates to the phenomenon known as the:

Question

Quizplus · Accepted Answer

The secular trend refers to the pattern of change in the timing of biological events, such as the decline in the average age of menarche over time, often due to improvements in nutrition and health.

In Western Countries, the Average Age for Menarche Has Declined