Baby Development

Your baby's physical development is a thing of beauty and a source of pride. From sitting to crawling, walking to talking, smiling to laughing, each achievement is a developmental milestone. Learn what to expect next in your baby's physical and intellectual development.

50 Simple Ways to Make Your Baby Smarter

Infant-development experts believe that the first years of a child's life are a prime time for learning, but sometimes it may be hard to think of new ways to stimulate your baby. Let these fun -- and scientific -- activities will inspire you.

Baby Growth Charts

Check out our baby growth chart to calculate your child's height and weight percentile. Whether your little one is going through a growth spurt or you're worried about baby's development, keep track of his early childhood development with our growth charts. Click "start now" to see where your child falls on our boys' and girls' growth charts.

Your Baby's Development Week-By-Week

The first year of life is, to put it simply, amazing. Use our week-by-week info as a guideline for changes to look for during the first 12 months--but remember, every baby develops at his or her own pace.

Your Guide to Baby's Weight Gain

Helping your baby steadily pack on the pounds during her first year of life can be tricky. Here's what to know about your baby's weight gain, how to make sure she's meeting doctor recommendations for food and weight in the appropriate month ranges, and how to keep her healthy and satisfied in the process.

Baby Talk: A Month-By-Month Timeline

As your baby grows and develops speech and language skills, babbles will slowly turn into words and then into sentences. So when do babies start talking and saying their first words? Follow our talking timeline to learn about this important child development milestone.

When Do Babies Start Talking?

If you're wondering when your little one will say "mama" or "dada," find out what age babies start to talk and improve language development. Here's what you should know about when babies babble and reach the important baby milestone of talking.

Do Women in Their 30s Have Smarter Babies?

Finally! Some good news for "older moms."

Do Tech Toys Hurt Baby's Language Development?

Time to put down the "smart" toys and get back to the wooden blocks, says a new study.

Baby Sign Language: Starter Signs

Ready to learn baby sign language? Begin with these eight commonly used words.

What You Need to Know About Birth Order

Your kids' birth order might affect their personalities more than you think. Learn more about which traits are common for oldest, middle, youngest, and only children.

How to Practice Tummy Time

Put your baby belly down for a bounty of benefits.

The Stages of Sitting

Watching your baby gain independence is exciting. A major accomplishments every parent looks forward to is when she can sit on her own. Pediatrician Kurt Heyrman, M.D. says there are ways that you can help Baby gain these large motor skills and help her sit on her own. Here's how.

Decoding Baby's Funny Little Noises and Sounds

Your child doesn't talk yet -- but she does have a language of her own. We'll tell you what she's communicating with her funny little noises and sounds.

How Birth Order Affects Your Child's Personality and Behavior

Whether you're firstborn, middle child, last-born, or only child, birth order can have a big effect on your personality and behavior.

Growth & Development Milestones: 1-3 Months

The American Academy of Pediatrics has identified important milestones for babies ages 1 month through 3 months. We've included fun and easy ways to help your newborn reach these key developmental markers, plus helpful information new parents should know.

Your Baby from 19 to 21 Months: Curiosity and Independence

Every day is full of new challenges, from taking the stairs to scaling the couch. Don't you wish you could bottle that energy?

When Do Babies' Eyes Change Color?

Heard your cutie's peepers may go from blue to brown? Find out why and when your baby's eyes will change color, and how genetics influence baby's physical development.

When Do Babies Start Smiling?

Your baby's smile, particularly the first, is one of the most rewarding moments of parenthood. But just when do babies smile? Learn about when your baby will start smiling and what it means for social and emotional development.

Why Researchers Say Snuggling With Baby Has Lifelong Positive Effects

Need another excuse to cuddle with your baby? Science says so!

Study: Newborns, Especially Preemies, Experience Too Much Pain

Pain that newborns experience from routine medical procedures can be significant, especially in premature infants, a new AAP study finds.

How to Massage Your Baby

Try these massage strokes to calm and connect with you baby.

Topics in Baby Development