Thirteen-year-old Grace's blood tests indicate that her levels of testosterone are about twice as high as they were a few years ago and that her estradiol levels are about eight times higher than earlier. This indicates that Grace is most likely to

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Grace's higher levels of testosterone and estradiol indicate that she is undergoing normal pubertal changes. Testosterone is responsible for the development of male secondary sexual characteristics and estradiol is responsible for female secondary sexual characteristics, so their increase in Grace's body indicates that puberty is progressing normally. Depressed and extreme behavior are not necessarily linked to hormone levels during puberty, and there is no indication that Grace will develop abnormal male or female physical characteristics.

Thirteen-Year-Old Grace's Blood Tests Indicate That Her Levels of Testosterone