Birth order is defined as a person's rank by age among his or her siblings. Birth order is often believed to have a profound and lasting effect on psychological development. This assertion has at best only limited empirical support and has been repeatedly challenged by researchers, yet birth order continues to have a strong presence in pop psychology and popular culture.
U.S. National Library of Medicine
The sequence in which children are born into the family.
The numerical value of birth order in Chaldean Numerology is: 7
The numerical value of birth order in Pythagorean Numerology is: 9
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