Presidents of the United States are firstborn children in huge numbers, followed by middles.

Since studies of firstborn children have shown that they tend to be more aggressive and achievement-oriented, this could further undermine the status of women.

Kill all the firstborn children.

Imaginary companions are more common among firstborn children and only children, according to Dr. Singer's research.

Hence third born children are not only third in birth order, but they are also more likely to come from larger, poorer families than firstborn children.

Scientists have found that they share many characteristics with firstborn children including being conscientious as well as parent-oriented.

Both Galishnikov and Sa'id were firstborn children.

In addition, they both were firstborn children from large families.

Shaky winners and shaky losers will lose digital cameras, firstborn children and composure at the first frustration.

She was the one he saw with both of his own firstborn children perched on her shoulders.