Marilyn C. Agin, M.D., is the medical director of the Early Intervention Program in New York City--the biggest program of its kind in the country. She has a master's degree in communication disorders and was a practicing speech pathologist. Dr. Agin is board certified in pediatrics and rehabilitation. She is co-author of The Late Talker: What to Do If Your Child Isn't Talking Yet. She lives in New York City.