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What Are the Key Developmental Milestones for an 8-Month-Old Baby?

Published January 23, 2026Updated January 23, 2026

Quick Answer

Key developmental milestones for an 8-month-old baby include advancing motor skills, such as sitting without support, and showing increased social interactions like responding to their name. The CDC highlights these as crucial aspects of development at this age.

Key Takeaways

  • Key developmental milestones for an 8-month-old baby include advancing motor skills, such as sitting without support, and showing increased social interactions like responding to their name. The CDC highlights these as crucial aspects of development at this age.
  • Evidence shows that 90% of babies sit without support by 8 months - CDC.
  • The AAP recommends encouraging crawling through safe floor time.
  • Studies indicate that babies begin to understand simple words at this age.
  • According to CDC guidelines, babies should respond to their name by 8 months.
  • WHO guidelines suggest supervised play to enhance social development for 8-month-olds.
  • Research published in Pediatrics shows the importance of varied stimuli for cognitive growth.

Quick Answer

Key developmental milestones for an 8-month-old baby include advancing motor skills, such as sitting without support, and showing increased social interactions like responding to their name. The CDC highlights these as crucial aspects of development at this age.

What You Need to Know

By the age of 8 months, babies are making significant strides in their development. This period is marked by advancements in motor skills, communication, and social interaction. According to the Centers for Disease Control and Prevention (CDC), 8-month-olds often exhibit the ability to sit without support, which is a critical motor development milestone. Furthermore, many babies begin to crawl, and some may even start to pull themselves up to a standing position.

In terms of communication, 8-month-olds typically respond to their names and can understand simple words like "no." The American Academy of Pediatrics (AAP) emphasizes the importance of engaging with your baby through talking and reading to foster language development. Socially, babies at this age show more interest in their surroundings, recognize familiar faces, and respond to emotions, which are pivotal for their emotional and social growth.

Evidence-Based Guidelines

The CDC provides specific guidelines for monitoring developmental milestones. These include observing how babies interact with the environment and people around them. For instance, by 8 months, most babies can pass objects from one hand to another, a skill that reflects their growing motor coordination.

The World Health Organization (WHO) suggests that supervised playtime is essential for enhancing both physical and social development. WHO guidelines highlight the importance of providing a safe space for exploration, which encourages crawling and other motor skills.

According to research published in the journal Pediatrics, varied stimuli, such as toys, books, and social interactions, are crucial for cognitive development at this age. Such activities help babies learn about cause and effect and develop problem-solving skills.

Common Questions Parents Ask

What motor skills should an 8-month-old have? At 8 months, babies typically can sit without support, crawl, and may begin to pull to stand. These activities are crucial for developing their coordination and muscle strength.

How can I encourage language development in my 8-month-old? Engage in frequent conversations, read aloud, and respond to their vocalizations. According to the AAP, these interactions are key in promoting language skills.

Is it normal for my 8-month-old not to crawl yet? While many babies begin to crawl at this age, some may develop this skill later. The CDC advises monitoring progress and consulting a pediatrician if there are concerns.

How much should an 8-month-old sleep? According to the AAP, an 8-month-old typically needs about 12-16 hours of sleep per day, including naps.

What are signs of social development in 8-month-olds? Babies may show social development by responding to their names, showing interest in people, and displaying a range of emotions.

Safety Considerations

Ensure that the environment is safe for exploration by baby-proofing your home. Remove small objects that could pose choking hazards and secure furniture that could topple. The AAP recommends closely supervising babies during playtime to prevent accidents.

When to Contact Your Pediatrician

If your baby shows no interest in interacting with others, does not respond to sounds, or is unable to sit without support by 8 months, it may be necessary to consult your pediatrician. Early intervention can be crucial in addressing developmental delays.

The Bottom Line

Monitoring the developmental milestones of an 8-month-old involves observing progress in motor skills, communication, and social interaction. The CDC, AAP, and WHO provide guidelines that emphasize the importance of engaging with your baby and ensuring a safe environment. Always consult your pediatrician if you have concerns regarding your baby's development.

Frequently Asked Questions

What motor skills should an 8-month-old have?

At 8 months, babies typically can sit without support, crawl, and may begin to pull to stand. These activities are crucial for developing their coordination and muscle strength.

How can I encourage language development in my 8-month-old?

Engage in frequent conversations, read aloud, and respond to their vocalizations. According to the AAP, these interactions are key in promoting language skills.

Is it normal for my 8-month-old not to crawl yet?

While many babies begin to crawl at this age, some may develop this skill later. The CDC advises monitoring progress and consulting a pediatrician if there are concerns.

How much should an 8-month-old sleep?

According to the AAP, an 8-month-old typically needs about 12-16 hours of sleep per day, including naps.

What are signs of social development in 8-month-olds?

Babies may show social development by responding to their names, showing interest in people, and displaying a range of emotions.

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