There is a lot of confusion about when to get a mammogram. Some groups say 40, some 50. Others say you should get a baseline at 40. Is it necessary? It sounds like a good idea, to have a picture of what things looked like so at 50 a doctor can determine if anything has changed. But is it really a good idea? What are the downsides or things you need to watch out for if your physician suggests a baseline mammogram. Dr. Kirtly Jones talks about those issues and what you need to know to have that conversation with your physician.