An authoritative yet girlfriend-friendly health book for teen and tween girls written by CBS News Medical Correspondent Dr. Jennifer Ashton AS an ob-gyn specialing in adolescent care, Dr. Jennifer Ashton understands better than anyone that being a teenage girl these days is fraught with a special kind of angst. But in her practice she talks openly and nonjudgementally to her young patients like a good friend, answering each of their...