Average weight (boy / girl) 4.5 / 4.2 kg
Sleep in 24 hours 14–17 h, 4–5 naps
Feeding Breast milk or formula only
🌱 Development at 1 monthFocuses on faces 20–30 cm away and prefers your face to anything else Startles at loud sounds; grasps your finger by reflex Lifts the head briefly during tummy time These are things most children (about 3 in 4) can do by this age. Babies born early may reach them later — use their corrected age.
📏 Growth: WHO weight, length and head sizeAny steady curve within this range is normal; what matters is that your baby follows their own curve over time.
🍼 FeedingBreast milk or formula only, on demand — usually 8–12 feeds in 24 hours No water, honey, ghutti or other liquids 😴 Sleep and teethTotal sleep: 14–17 h in 24 hours, usually 4–5 naps (National Sleep Foundation and American Academy of Sleep Medicine ranges). Most babies get their first tooth between 6 and 10 months, though some start at 4 months and some after 12. 💉 Vaccines due at 1 monthYour paediatrician may group doses differently. Keep the vaccination card safe.
💡 Tips for this monthGive vitamin D drops (400 IU a day) if breastfeeding, as your doctor advises Always put your baby to sleep on the back, in their own cot 2 months → ❓ Frequently asked questions
What should a 1-month-old be doing? Most 1-month-olds: focuses on faces 20–30 cm away and prefers your face to anything else; startles at loud sounds; grasps your finger by reflex; lifts the head briefly during tummy time.
How much should a 1-month-old weigh? The WHO median is 4.5 kg for boys and 4.2 kg for girls; the normal range is wide (see the table).
How much should a 1-month-old sleep? 14–17 h in 24 hours including 4–5 naps.
🔁 Nearby months