Development Milestones
G Gross Motor
- Rolls from tummy to back reliably
- Pushes up on straight arms in tummy time
- Bears weight on legs when held standing
- Sits with significant support (tripod sit beginning)
F Fine Motor
- Reaches for and grasps objects intentionally
- Transfers object from one hand to the other (beginning)
- Puts everything in mouth - Normal oral exploration
L Language & Communication
- Babbles with more varied sounds ("ba-ba", "da-da")
- Mimics some sounds back at you
- Laughs readily - Giggling is a communication tool
S Social & Emotional
- Excited at familiar people; may show stranger wariness
- Loves interactive games (peek-a-boo coming soon)
- Expresses displeasure clearly with crying or turning away
Sleep & Feeding
Sleep
14 hrs/day
Night: ~10 hrs
Naps: 3 × 1–2 hrs
Feeding
5–6 times/day · 150–180 ml/feed (formula)
Sleep breakdown
Night 10h
Naps 4h
Sample Daily Routine
7:00 AM
Wake · feed
8:00 AM
Play (1.5–2 hrs)
9:30 AM
Nap (1–1.5 hrs)
11:00 AM
Feed · play
1:00 PM
Nap (1–1.5 hrs)
3:00 PM
Feed · outdoor outing
5:00 PM
Catnap (30–45 min)
7:30 PM
Bath · feed · bed
Times are approximate guides only. Follow your baby's hunger and sleepy cues.
Play & Activity Ideas
- Soft stacking cups to hold and chew
- Peek-a-boo and "where did it go?" games
- Supported sit in Bumbo-type seat for short periods
- Splash in baby bathtub - Water play is sensory rich
When to Consult Your Paediatrician
If your baby is NOT doing any of the following, speak to your doctor - Early intervention is key:
- Does not bring objects to mouth
- Does not push down on legs when feet placed on firm surface
- Does not make vowel sounds ("ah", "eh", "oh")
- Not rolling in either direction by 5 months
Singapore-Specific Advice
The 4-month sleep regression is very common - Wakings increase suddenly as sleep cycles mature. This is normal development, not a feeding problem. Avoid starting solids early to "fix" sleep - It does not help and early introduction is not recommended before 6 months.
Vaccinations This Month
- 4 months: DTaP/IPV/Hib/HepB (3rd) · Rotavirus (3rd) · PCV13 (3rd)
Check the Immunization Tracker for the full Singapore NCIS schedule.
Remember: Every baby develops at their own pace. These milestones are general guides based on WHO standards. Always consult your paediatrician, polyclinic, or family doctor if you have any concerns about your baby's development.
WHO Growth (50th %ile)
Boys - Weight7.0 kg
Girls - Weight6.4 kg
Boys - Height63.9 cm
Girls - Height62.1 cm