Zaria was just 9 years old when a nurse practitioner delivered news that rocked her world: The young girl was already showing signs of puberty development, and she was on track to get her period ...

More girls are hitting puberty at eight or earlier. Researchers are exploring the causes, the consequences and what should be done. When Lola was eight years old, she went through a massive growth ...

Add Yahoo as a preferred source to see more of our stories on Google. The most significant breast changes are the result of hormone fluctuations, say experts. (Photo illustration: Ivana Cruz for Yahoo ...

There is a misconception that breasts reach their forever state at the end of puberty. In reality, that's only the beginning of their ever-changing appearance and feel. As Dr. Cara Natterson and ...