What is the term that is used to describe the downward trend in the age of menarche?

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The term used to describe the downward trend in the age of menarche is the secular trend. This trend refers to the long-term changes in physical development and growth that occur across successive generations. The trend towards earlier onset of menarche has been observed in many countries around the world and is believed to be influenced by a number of factors, including improved nutrition and healthcare, changes in lifestyle and environmental factors, and genetic factors.

What Is the Term That Is Used to Describe the Downward