Louise Greenspan Author

Louise Greenspan, MD, a board-certified endocrinologist focusing on puberty and an international leader in the field, works at Kaiser Permanente and is on faculty at UCSF.

Julianna Deardorff, PhD, is a clinical psychologist with a specialty in adolescence, and is on faculty at UC Berkeley. The authors' pioneering work on a recent early puberty study won them the 2013 Community Breast Cancer Research Award. They have contributed to Time magazine, Science, New York Times Magazine, and NPR. Both have young daughters and live in the San Francisco Bay Area.