When does a girl become a woman? Of course, it depends. It depends on how you define "woman" and that depends on the seven domains of a woman's health. For some, becoming a woman is when she has her first period. For others, it's when she's able to form her own judgment and thought. But, as with all "Seven Domains" topics, it's so much more than that. Pediatrician Cindy Gellner, MD, joins this episode of 7 Domains of Women's Health to discuss when a girl becomes a woman.