A reporter explores the alleged link between being left-handed and an increased risk of migraines. Discussion of this link began in the 1980s, when a study suggested that people who were left-handed had several times the risk of chronic headaches and immune disorders. The reason, it was theorized, had something to do with variations in fetal brain development. In this article, the reporter updates the research connecting migraines and left-handedness, and comes to a "bottom line" about the link.