Firstborn children often have slightly higher IQs and complete more years of schooling than their younger siblings, but birth order accounts for no meaningful differences in personality.

First, you have to separate the only children from children with siblings. Then you have to look at actual birth order (first, middle, last) and, from there, consider family size. Other issues ...

As you tune in for Season Three, here’s a guide to the Bridgerton siblings’ names and birth years ... Their names are in alphabetical order, from Anthony to Hyacinth. Everyone’s favorite ...

In one sketch, the youngest child tells Chatur that "if I'm not the best, people won't care about me," and then whips out an entire essay he wrote about the topic for his therapist to ingratiate ...

Sibling relationships are important. While friendships come and go, you’re stuck with your siblings. This relationship is oftentimes one of the longest relationships in a person’s life.