What are the typical developmental milestones at 9 months of age?

From the Guidelines

At 9 months of age, babies typically demonstrate the ability to roll to both sides, sit well without support, and exhibit motor symmetry, as highlighted in the 2013 Pediatrics study 1. These milestones are crucial indicators of typical development, and their absence may signify a delay. According to the American Academy of Pediatrics, periodic developmental screening should be performed at the 9-, 18-, and 30-month visits to identify potential delays early on 1. Some key milestones to expect at 9 months include:

• Rolling to both sides
• Sitting without support
• Demonstrating motor symmetry It is essential to note that development occurs at individual rates, and some babies may achieve these milestones slightly earlier or later than others. However, if there are concerns about a baby's development, it is crucial to consult a pediatrician for guidance and support 1. Regular well-child visits play a vital role in tracking a baby's progress and addressing any concerns early, allowing for timely referrals for developmental interventions and diagnostic evaluations if needed 1.

From the Research

Developmental Milestones at 9 Months

• At 9 months, children typically exhibit certain developmental milestones, including improved motor skills and cognitive development 2
• According to the American Academy of Pediatrics, developmental surveillance should be conducted at each well-child visit, with formal developmental screening at 9,18, and 30 months 2
• The 9-month screening is crucial in identifying potential developmental delays or disorders, such as speech and language delay 3
• Children at 9 months should also be screened for autism-specific symptoms, although the U.S. Preventive Services Task Force found insufficient evidence to make a recommendation 2

Physical and Cognitive Development

• By 9 months, children usually demonstrate significant improvements in their physical abilities, such as running speed and standing broad jump, as seen in preschool children participating in a physical activity intervention 4
• Cognitive skills, including problem-solving and social-emotional development, also show progress around this age, with varied improvements observed in different variables 4, 5
• However, it is essential to note that every child develops at their own pace, and some may need more time to reach certain milestones 6

Screening and Surveillance

• Regular screenings and surveillance are vital in monitoring a child's development and identifying potential issues early on 6, 2
• The use of standardized tools and tests can help healthcare providers assess a child's developmental progress and provide targeted interventions if necessary 6, 3