← Infant · Development & Milestones
Infant · Development & Milestones
Development & Milestones for the Infant stage (3 – 12 mo).
7 guides in this cell
— Reading list
All Development & Milestones guides for Infant
3 Months Old: Milestones, Red Flags, and What to Do
At three months, most babies are smiling socially, tracking faces and objects, lifting their head during tummy time, and beginning to "talk" back to y...
How to Help Your Baby Learn to Sit Up on Their Own
Most babies sit unsupported between 4 and 7 months, but you can actively speed that process along with daily tummy time, targeted play positions, and...
9 Months to 1 Year: Your Baby's Development Milestones Explained
Between 9 and 12 months, your baby progresses through some of the fastest developmental changes of their entire childhood, spanning mobility, language...
Physical Development: Building the Strength to Explore
Between 2 and 3 months, your baby makes some of the fastest developmental leaps of their entire life — from holding their head steady to flashing thei...
Physical Development: Rolling, Reaching, and Building Core Strength
Between 4 and 6 months, your baby undergoes some of the fastest developmental change of their entire life — across physical, cognitive, social, and la...
Physical Development: From Sitter to Mover
Between 7 and 9 months, your baby moves through one of the most dramatic developmental leaps of their first year — gaining mobility, deepening emotion...
The Science Behind Tummy Time: Why Position Is Everything
Tummy time is the single most effective daily habit you can build for your infant's physical and cognitive development — strengthening neck and core m...