Baby Week by Week

Small and sweet, yes. But clueless? Not your little one! Read on for fascinating development research about (and simple recommendations for) your baby during these first 52 weeks.
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Mom holding smiling baby
Your Brilliant Baby in Week 16: Improving Vision
While your baby has been able to see since birth, her eyesight is becoming stronger and more refined right now. Learn more about Baby's visual ... Read More
Baby laying on the ground
Your Brilliant Baby in Week 17: Paying Attention to Patterns
By week 17, Baby is able to discern items placed horizontally from those placed vertically, plus identify images with two things in them ... Read More
Baby with Mom at the pool
Your Brilliant Baby in Week 18: Synchronizing Sound with Movement
Baby is happiest when his senses, well, make sense to him. He's happy when he's stimulated but gets cranky fast if there's too much going on. ... Read More
Baby at playground
Your Brilliant Baby in Week 19: Prefering Music to Talking
It's a natural reaction to pick up Baby and start singing softly—and research shows your voice in particular has an incredible calming ... Read More
Baby Laughing
Your Brilliant Baby in Week 20: Understanding Trajectory
Cars, toys, balls, people: Right now Baby is keenly aware of the way items around her move through her world. Learn more about your child in week ... Read More
Dad playing with baby outside
Your Brilliant Baby in Week 21: Matching Sound with Movement
You child is not only paying attention to the sounds coming out of your mouth this week: He's also paying attention to where you are in relation ... Read More
Baby Smiling at Pinwheel
Your Brilliant Baby in Week 22: Knowing Which Objects Move Themselves
Baby is becoming wise to the way objects move around her: In week 22, she understands that inanimate objects can't move themselves, but ... Read More
Laughing Baby
Your Brilliant Baby in Week 23: Understanding Stable and Unstable Objects
Even at this young age, your child realizes how precarious a toy placed at the edge of a table is, plus how much more stable that object is in the ... Read More
Baby and Blocks
Your Brilliant Baby in Week 24: Using Primitive Arithmetic
Though Baby can't count out loud just yet, his primitive arithmetic skills are developing. See what he's capable of in week 24. ... Read More
Baby in a Diaper Crawling
Your Brilliant Baby in Week 25: Crawling & Judging Depth Perception
As Baby begins to hit some major mobility milestones, his depth perception becomes fine-tuned. Read more about how this affects your child's ... Read More
Father Holding Laughing Baby
Your Brilliant Baby in Week 26: Differentiating Lullabies & Play-Songs
Research shows that babies respond very differently emotionally to lullabies (think "Rock a Bye Baby") and play songs (think "Where is ... Read More
Baby in Car Seat
Your Brilliant Baby in Week 27: Reading Emotions
Your emotions are no secret to Baby these days: His ability to read how you're feeling is a finely tuned skill in week 27. Read on! ... Read More
Laughing Baby Lying Down
Your Brilliant Baby in Week 28: Following Items Out of Sight
Around week 28, your baby's understanding of object permanence is evolving: She now knows items will continue to exist once they're out of ... Read More
Baby Reaching for Object
Your Brilliant Baby in Week 29: Learning about Moving & Stationary Objects
Baby is catching on quickly to the way things move, and this week she's grasping that moving objects displace stationary ones. Read more about ... Read More
Crawling Baby
Your Brilliant Baby in Week 30: Finding Partially Hidden Objects
As your child's understanding of object permanence continues to deepen, he's able to find toys partially hidden under pillows, pacifiers, ... Read More
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