What is the stage of development in which reproductive system starts to mature?
Puberty is a complex process that involves a series of physical changes, including:
* For girls: Breast development, growth of pubic hair, widening of hips, first menstrual period (menarche)
* For boys: Growth of testes and penis, deepening of voice, growth of facial and pubic hair
These changes are triggered by hormones, primarily estrogen and progesterone in girls, and testosterone in boys.
It's important to note that puberty occurs at different ages for different people, and it's considered a normal part of development.
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