Preemie Milestones by Corrected Age: Month by Month (2026)

If you’ve ever frantically Googled “when should my baby roll over” and then panicked at the answer, this guide is for you. The milestone charts you find online are built for full-term babies. For a preemie, they’re the wrong measuring stick—and they’ll make a perfectly on-track baby look “behind.”

The fix is to use corrected age (also called adjusted age): your baby’s chronological age minus the number of weeks they were born early. Kadeem built Adjusted Age after his son arrived at 29 weeks, precisely because no one handed him a milestone chart that accounted for that.

A quick, important note before the list: the CDC and AAP milestone checklists (revised in 2022) use a 75th-percentile standard—meaning these are things 75% or more of children can do by that age. Always apply them to your baby’s corrected age, and remember that a range of normal is wide. These are guideposts, not a test.

2 Months Corrected

• Gross motor: Holds head up briefly during tummy time.
• Fine motor: Begins opening hands instead of keeping them constantly fisted.
• Speech & language: Makes sounds other than crying, and reacts to loud sounds. Cooing (“ooo,” “ahh”) usually follows by 4 months.
• Social: Begins to smile back when you smile at them.

4 Months Corrected

• Gross motor: Holds head steady without support; pushes up onto elbows during tummy time.
• Fine motor: Brings hands to mouth consistently; holds a toy placed in their hand.
• Speech & language: Coos (“oooo,” “aahh”), makes sounds back when you talk, and turns toward your voice.
• Social: Chuckles or laughs; smiles to get your attention.

6 Months Corrected

• Gross motor: Rolls from tummy to back; sits with support or by “tripoding” on their hands.
• Fine motor: Reaches to grab a toy they want and puts things in their mouth to explore. Passing objects from hand to hand usually comes by 9 months.
• Speech & language: Takes turns making sounds; blows raspberries and squeals.
• Social: Recognizes familiar faces; loves looking at themselves in a mirror.

9 Months Corrected

• Gross motor: Gets into a sitting position on their own; sits without support.
• Fine motor: Uses a “raking” grasp to pull objects closer; bangs two toys together.
• Speech & language: Strings consonants together (“ba-ba,” “da-da”); lifts arms to be picked up.
• Social: Plays games like peek-a-boo; may show stranger anxiety.

12 Months Corrected

• Gross motor: Pulls up to stand; cruises along furniture.
• Fine motor: Uses a true pincer grasp (thumb and index finger); drops objects into a container.
• Speech & language: Waves “bye-bye”; uses a meaningful word or two like “mama” or “dada.”
• Social: Plays pat-a-cake; responds reliably to their own name.

What to Do If Something Feels Off

Milestones come in ranges, and preemies often hit them in bursts and plateaus rather than smoothly. But you know your baby. If your child is consistently far outside these ranges even after correcting for age, or if they lose a skill they previously had, talk to your pediatrician. Early intervention (PT, OT, speech) is powerful, free or low-cost in many areas, and the earlier it starts, the better it works. Asking is never an overreaction.

The Bottom Line

Use corrected age. Celebrate progress in your baby’s own direction, not against the calendar or the baby next door. A preemie reaching these milestones a little later by birth date is usually a preemie reaching them right on time by corrected age.

Not sure of your baby’s corrected age this month? Our Adjusted Age Calculator does it instantly—so you always know which column on the chart is actually yours.

Approaching the 2-year mark? Read: When to Stop Adjusting Age for Preemies: What the 24-Month Milestone Really Means