21.   Q. Has any statistical relationship been found between birth order and height?

22.   She studies the impact of family size and birth order on children.

23.   So will their birth orders make Adam spoiled and Sarah neurotic?

24.   Some siblings, regardless of birth order, may be more assertive by nature, while others may have more urgent needs for love and attention.

25.   Sulloway is the first to admit that the effects of birth order can be offset, exaggerated or even overridden by other factors.

26.   Stephanie is not troubled by her contradiction, and neither is psychologist Kevin Leman of Tucson, a specialist in birth order.

27.   The influence of birth order on child development is widely debated among clinicians and researchers.

28.   The researchers concluded that birth order is a factor that contributes significantly to the variance of adult height among siblings.

29.   There is no preferred birth order for an employee, she said.

30.   Toni Falbo, a psychologist at the University of Texas in Austin, agrees that jumping from birth order and stress in monkeys to humans is a bit tricky.