An exploration of how sibling position influences personality development. Birth order doesn't just determine when family photos are arranged.

“I think birth order does matter, but not always in the way you might expect,” says Marie Soller, M.D., Board-Certified ...

Birth order can provide helpful insights ... Others might be more high-strung, trying to live up to the older sibling's example or carve out their own identity. As parents, they might be more ...

Firstborns, for example, often get shafted because parents ... and can be manipulative to get his or her way. Clearly, birth order affects personality, but what about career advancement and ...