Sibling Rivalry

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Watch: Twin Finds Out She's 1 Minute Younger and Can't Handle the Truth

Finding out they aren't 100 percent identical is just too much to take for these toddler twins.

Study Confirms Your Deepest, Darkest Secret: You DO Have a Favorite Kid

Say it ain't so! A study found that parents may, in fact, favor one child over another.

Study: Kids with Half- and Step-Siblings Are More Aggressive

Aggressive behavior is more common in kids who live with half- and step-siblings, a new study finds.

7 Fun Ways to Announce Your Pregnancy to Your Toddler

Get your toddler excited about being a big brother or sister!

6 Small Ways to Make Each of Your Kids Feel Special

Found: Simple but powerful ways to ensure all of your children feel like a VIP.

Are Smaller Families Better for Kids?

A new study says more siblings equal more problems for kids in large families.

20 NICU Babies Meet Their Big Sibs for the First Time

Some siblings have to wait longer to meet their little brother or sister—but that doesn't mean they're any less excited! These adorable reader-submitted images perfectly depict the excitement big sibs feel when they finally meet the newest addition to the family.

How to Stop Siblings from Fighting

Most siblings have disagreements at some point, but frequent, intense fights can cause serious damage. If you've had it up to here with sibling fighting, we'll help you reach a cease-fire.