Tammy Chang, U-M Medical School (IMAGE) Michigan Medicine - University of Michigan Caption Tammy Chang, M.D., MPH, MS, a clinical lecturer in the department of family medicine at the U-M Medical School, is the lead author on the first nationally represented study linking teen pregnancy to obesity later in life. Credit University of Michigan Health System Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.