11.   Birth order and gender also may affect the rate of accidental injury.

12.   Birth order may not be the main predictor of personality, but chances are it contributes.

13.   A lot has been written about birth order and how it affects children.

14.   By virtue of birth order, first- and last-borns tend to bond most intensely with parents.

15.   Even birth order can come into play at work.

16.   He was fourth in birth order, preceded by three formidable sisters.

17.   How birth order shapes our tendency to accept or reject authority.

18.   If handedness is clearly tied to birth order in chimps, it could throw a monkey wrench into theories of handedness in humans as well.

19.   In it, he argued that birth order is the most reliable predictor of openness to innovation and social change.

20.   Like birth order, interest in family placement seems unwavering.