Baby Development Month by Month
WHO-standard growth data, milestone checklists, sleep schedules and feeding guides - For every stage of your baby's first year.
Four Developmental Stages
Newborn Stage
Rapid brain growth. Reflexes dominant. Sleeps most of the day. Bonding and feeding are the focus.
Discovery Stage
Smiling, laughing, and reaching. Tummy time critical. Sleep consolidating. Social interactions begin.
Mobility Stage
Sitting, then crawling. Solids introduced at 6 months. Stranger anxiety peaks. Two naps daily.
WHO Growth Chart - Weight (kg)
50th percentile · Boys (teal) vs Girls (pink) · Source: WHO Child Growth Standards
WHO Growth Chart - Length/Height (cm)
50th percentile · Boys (teal) vs Girls (pink) · Newborn to 12 months
Use the Growth Chart Calculator to plot your baby's measurements against WHO percentiles.
Sleep by Month
Total hours/day · Nighttime sleep vs daytime naps
Browse Every Month
Newborn
Grip reflex · Recognises your voice · Feeds 8–12×/day
Month 1
Tracks faces · Brief smiles · Stronger neck control
Month 2
Social smiles · Coos · Tracks moving objects
Month 3
Laughs · Rolls side to side · Reaches for objects
Month 4
Rolls both ways · Grasps intentionally · Babbles
Month 5
Sits with support · Passes objects between hands · Says name
Month 6
Sits unsupported · Ready for solids · Says "mama" "dada"
Month 7
Crawls or scoots · Waves bye-bye · Understands "no"
Month 8
Pulls to stand · Pincer grip · Peek-a-boo · Stranger anxiety
Month 9
Cruises furniture · 1–2 words · Finger food self-feeding
Month 10
Stands alone · Claps hands · Imitates sounds · Cup drinking
Month 11
Walks with one hand held · 2–3 words · Points to body parts
Month 12
First steps · 3+ words · Follows simple directions · Stacks blocks
WHO Growth Data at a Glance
50th percentile averages. Every baby is different - Always consult your paediatrician.
| Month | Boy Wt | Girl Wt | Boy Ht | Girl Ht | Total Sleep | Naps |
|---|---|---|---|---|---|---|
| Newborn | 3.3 kg | 3.2 kg | 49.9 cm | 49.1 cm | 17 hrs | 4×/day |
| Month 1 | 4.5 kg | 4.2 kg | 54.7 cm | 53.7 cm | 16 hrs | 3×/day |
| Month 2 | 5.6 kg | 5.1 kg | 58.4 cm | 57.1 cm | 15 hrs | 3×/day |
| Month 3 | 6.4 kg | 5.8 kg | 61.4 cm | 59.8 cm | 15 hrs | 3×/day |
| Month 4 | 7.0 kg | 6.4 kg | 63.9 cm | 62.1 cm | 14 hrs | 3×/day |
| Month 5 | 7.5 kg | 6.9 kg | 65.9 cm | 64.0 cm | 14 hrs | 3×/day |
| Month 6 | 7.9 kg | 7.3 kg | 67.6 cm | 65.7 cm | 14 hrs | 2×/day |
| Month 7 | 8.3 kg | 7.6 kg | 69.2 cm | 67.3 cm | 14 hrs | 2×/day |
| Month 8 | 8.6 kg | 7.9 kg | 70.6 cm | 68.7 cm | 13 hrs | 2×/day |
| Month 9 | 8.9 kg | 8.2 kg | 72.0 cm | 70.1 cm | 13 hrs | 2×/day |
| Month 10 | 9.2 kg | 8.5 kg | 73.3 cm | 71.5 cm | 13 hrs | 2×/day |
| Month 11 | 9.4 kg | 8.7 kg | 74.5 cm | 72.8 cm | 13 hrs | 2×/day |
| Month 12 | 9.6 kg | 8.9 kg | 75.7 cm | 74.0 cm | 12 hrs | 1×/day |
Essential Baby Tools
Singapore Well-Baby Checks
MOH-recommended developmental screening visits happen at birth, 1 week, 1 month, 3 months, 6 months, 9 months, 12 months, and 15 months. Book these at your nearest polyclinic or paediatrician. Growth measurements are plotted against WHO standards at every visit.
Every baby develops at their own pace. Consult your doctor if you have any concerns.