DevelopmentAge 9-12 monthsEvidence-based

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What Should My 9 to 12 Month Old Be Doing?

Published January 13, 2026Updated January 13, 2026

Quick Answer

Developmental milestones for a 9 to 12-month-old include crawling, standing with support, and beginning to say simple words. According to the American Academy of Pediatrics (AAP), these skills are typical as babies explore their environment and communicate more effectively.

Key Takeaways

  • Developmental milestones for a 9 to 12-month-old include crawling, standing with support, and beginning to say simple words. According to the American Academy of Pediatrics (AAP), these skills are typical as babies explore their environment and communicate more effectively.
  • Evidence shows that around 90% of babies crawl by 10 months - AAP.
  • The AAP recommends encouraging exploration and play to support motor skills.
  • Studies indicate speech development starts with simple words around 12 months.
  • According to CDC guidelines, babies should show interest in social interaction by 12 months.
  • WHO guidelines suggest introducing diverse foods for nutritional balance at this age.
  • Research published in Pediatrics shows that consistent routines aid in cognitive development.

Quick Answer

Developmental milestones for a 9 to 12-month-old include crawling, standing with support, and beginning to say simple words. According to the American Academy of Pediatrics (AAP), these skills are typical as babies explore their environment and communicate more effectively.

What You Need to Know

Between 9 and 12 months, your baby is likely to go through significant changes, both physically and cognitively. This period is marked by increased mobility as many babies start crawling, standing with support, and possibly taking early steps.

According to the AAP, by 9 months, most babies can sit without support, crawl, and respond to their name. They enjoy playing peek-a-boo and are starting to understand object permanence. By 12 months, they may say their first words and follow simple instructions, reflecting growing cognitive and social skills.

Evidence-Based Guidelines

The Centers for Disease Control and Prevention (CDC) outlines several key developmental milestones for this age group. By 12 months, babies should be able to:

  • Pull themselves up to stand
  • Walk while holding onto furniture
  • Respond to simple spoken requests
  • Use simple gestures, such as shaking head 'no' or waving 'bye-bye'

The World Health Organization (WHO) emphasizes the importance of introducing a variety of solid foods to meet nutritional needs, alongside continued breastfeeding or formula feeding.

Common Questions Parents Ask

What should a 9-month-old be doing? By 9 months, many babies can sit without support, crawl, and respond to their name. Socially, they might be wary of strangers and show attachment to familiar caregivers.

When do babies typically start walking? Most babies take their first steps between 9 and 12 months and are walking well by 14 to 15 months, according to the CDC.

How many words should a 12-month-old say? By 12 months, babies might say one or two simple words, such as 'mama' or 'dada'. The AAP emphasizes that comprehension is more advanced than speech at this age.

Safety Considerations

Ensuring safety at home is crucial as babies become more mobile. The CDC recommends childproofing the home by securing furniture, keeping small objects out of reach to prevent choking, and supervising babies at all times to prevent falls.

When to Contact Your Pediatrician

If your baby is not meeting several milestones, such as not making eye contact, not babbling, or not responding to their name by 12 months, it is important to consult with your pediatrician. Early intervention can be crucial for addressing potential developmental delays.

The Bottom Line

While every child develops at their own pace, the period between 9 to 12 months is generally marked by significant strides in mobility, communication, and social interaction. Encouraging exploration, providing a safe environment, and consulting healthcare providers when necessary can support your child's healthy development.

Frequently Asked Questions

What should a 9-month-old be doing?

By 9 months, many babies can sit without support, crawl, and respond to their name. Socially, they might be wary of strangers and show attachment to familiar caregivers.

When do babies typically start walking?

Most babies take their first steps between 9 and 12 months and are walking well by 14 to 15 months, according to the CDC.

How many words should a 12-month-old say?

By 12 months, babies might say one or two simple words, such as 'mama' or 'dada'. The AAP emphasizes that comprehension is more advanced than speech at this age.

Is it normal for a 10-month-old not to crawl?

Yes, some babies skip crawling and go straight to pulling up and walking. If there are concerns about motor development, consulting a pediatrician is advisable.

What foods can a 9 to 12-month-old eat?

WHO guidelines recommend introducing a variety of mashed or chopped foods, including fruits, vegetables, and proteins, while continuing breastfeeding or formula feeding.

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💡 Note: This content is curated from official health organization guidelines. For original source citations, see the "Sources" section above.

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This content is educational and does not replace professional medical advice. Always consult your pediatrician for personal health concerns.

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