Brain Development by Age: Understanding Developmental Points for Babies Aged 0-3 Months
This section introduces the sensory, cognitive, emotional, social, and language development characteristics of babies aged 0-3 months. Baby Pastel provides developmental points by month to ease the worries of new parents, along with developmental check criteria for premature babies.
Last updated June 25, 2026
Guide content
Brain Development by Age VOL.1: Understanding Key Points for 0-3 Months
For new parents, it’s natural to worry about whether your baby is growing well according to their age. Baby Pastel simplifies the key developmental points for babies aged 0-3 months.
1. Sensory and Cognitive Development
During this period, babies play with their hands and gaze at them intently. They can also turn their heads towards sounds and naturally shift their gaze to follow moving mobiles.
2. Emotional and Social Development
Babies enjoy looking at human faces, appreciate warm physical contact, and begin to express their desire to be held. Gradually, they start to recognize familiar voices and can make eye contact with their parents.
3. Language Development
"Waaah!!" Through loud crying, they actively express their hunger or discomfort. When mom and dad speak kindly, they begin to respond with adorable cooing, marking a lovely stage of development.
[What if your baby was born premature?]
When checking your baby's developmental status, remember to use the 'Corrected Age' based on the original due date, not the actual birth date! (Corrected Age = Actual Age - (40 weeks - Actual Weeks Born)).
Checklist
- Check if the baby is looking at or playing with their hands.
- Observe if the baby turns their head towards sounds like rattles or looks at mobiles.
- Check if the baby makes eye contact with parents and enjoys physical affection.
- Confirm if the baby responds with cooing to the parents' kind voice or talking.
- For premature babies, check developmental status based on the 'due date' rather than the actual birth date.
Frequently asked questions
Is it okay if the baby can't follow the mobile yet?
The period from 0-3 months is when vision gradually develops, and there may be slight differences in development speed among children. Starting with a black-and-white mobile around 1 month and gradually switching to a colored mobile while providing continuous visual stimulation will greatly help in developing their ability to focus and track.
Until when should we calculate the development of a premature baby using corrected age?
It is generally recommended to use the corrected age (due date) for developmental assessments and check-ups until around 24 months (2 years) of age, rather than the actual birth date.
