Do You Feel Estranged from Your Siblings?

March 12 -- Did you grow up feeling your siblings got all the attention? No matter how hard you tried, did you feel you never were able to measure up to your siblings' accomplishments? Do you feel your parents had a definite favorite and it wasn't you? Have you and your siblings grown apart because of it?

If you answered "yes" to any of the above questions, you're not alone. Studies reveal that most parents behave differently with different offspring and it can have a profound impact on sibling relationships long into adulthood.

In an upcoming hour, 20/20 will take a look at the complexity of sibling relationships. If you feel parental favoritism had a profound impact on your life and would be interested in sharing your story on camera, please send us your name, e-mail address and telephone number and a few sentences about your family circumstances. Please include your hometown as well.