Puberty began for Nancy when she was 9 years old. Her mother began puberty at 11 years. For her grandmother, the onset was at 13 years of age. These changes in the age of onset of puberty over time are referred to as:

Question

Quizplus · Accepted Answer

The changes in the age of onset of puberty over time are referred to as the secular trend. This trend is characterized by an earlier onset of puberty in more recent generations compared to earlier generations.

Puberty Began for Nancy When She Was 9 Years Old