Editor’s note: The podcast Chasing Life With Dr. Sanjay Gupta explores the medical science behind some of life’s mysteries big and small. You can listen to episodes here. (CNN) — Puberty: It’s one of ...

Few topics provoke as much concern as the perception that puberty is beginning earlier than ever. While synthetic endocrine-disrupting chemicals are often cast as the primary culprits, puberty is ...

At the age of 9, years before her friends—and worse, before her older sister—Emma started developing breasts. Within months, she got her period. She was so ashamed she didn’t tell her parents or any ...