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Baby at 9–12 months: feeding, sleep and milestones

Stage: 9–12 months

Sleep

2 naps, moving towards 1. Many babies follow a 2-3-4 rhythm: 2 hours awake before the morning nap, 3 before the afternoon nap, 4 before bedtime.

Feeding

3 solid meals plus healthy snacks; milk feeds continue alongside. Encourage a varied diet and self-feeding with soft finger foods.

Formula: 2–3 feeds a day, 7 oz (200 ml). Wind formula down towards the first birthday — from 12 months, whole cow's milk can replace it. Toddler milks are not needed (AAP).

Diaper size

Size 4, 22–37 lb (10–17 kg).

Development at this stage

• Pulls up to standing, may stand alone briefly
• Pincer grip (thumb and forefinger)
• First words like 'mama'/'dada'
• Plays peekaboo and claps on request

Care & things to watch

• Brush teeth twice a day with a rice-grain smear of fluoride toothpaste
• Daily vitamin D continues if breastfed; still no honey, added salt or sugar
• 12–15 month vaccinations: MMR, chickenpox (varicella), hepatitis A, plus Hib and pneumococcal boosters — spread across the 12- and 15-month well-child visits
• Secure furniture and stair gates now standing and cruising start
• Move from bottle to an open or straw cup from 9–12 months — prolonged bottle use affects teeth
• Keep the car seat rear-facing — the AAP advises rear-facing as long as the seat allows, typically well past age 2
• Restlessness around milestones like crawling, standing or walking can temporarily disturb sleep — normal, and it passes once the new skill is mastered

Other ages: 0–6 weeks · 6–12 weeks · 3–4 months · 4–6 months · 6–9 months · 12–18 months · 18–24 months · 2–3 years · 3–4 years · 4–5 years