As I learned from Louise Greenspan, a pediatric endocrinologist and researcher at Kaiser Permanente, puberty is now starting as early as 7 years old in American girls. My daughter is almost 8 years old, so obviously, this caught my attention. Greenspan was recently a guest on the Dr. Oz show discussing the causes behind the rising rates of early puberty. She outlined the 3 major theories for the change: Read more...