Average weight (boy / girl) 8.9 / 8.2 kg
Sleep in 24 hours 12–16 h, 2 naps
Feeding Solids + milk feeds
🌱 Development at 9 monthsSits without support and gets into sitting on their own Looks when you call their name Makes sounds like "mamamama" and "bababa" Moves things smoothly from one hand to the other 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.
🍼 FeedingThree meals and 1–2 snacks a day plus milk feeds Mashed family food without added salt or sugar 😴 Sleep and teethTotal sleep: 12–16 h in 24 hours, usually 2 naps (National Sleep Foundation and American Academy of Sleep Medicine ranges). Teeth that often come through around now: lower front teeth (central incisors), upper front teeth, upper side incisors. 💉 Vaccines due at 9 monthsYour paediatrician may group doses differently. Keep the vaccination card safe.
💡 Tips for this monthA 9-month developmental check is a good time to raise any concerns Let your baby practise feeding with fingers and a spoon ← 8 months 10 months → ❓ Frequently asked questions
What should a 9-month-old be doing? Most 9-month-olds: sits without support and gets into sitting on their own; looks when you call their name; makes sounds like "mamamama" and "bababa"; moves things smoothly from one hand to the other.
How much should a 9-month-old weigh? The WHO median is 8.9 kg for boys and 8.2 kg for girls; the normal range is wide (see the table).
How much should a 9-month-old sleep? 12–16 h in 24 hours including 2 naps.
🔁 Nearby months