All babies have their own timetable, but you can watch for certain developments in your 9-month-old. Celebrate with your baby as he reaches or nears these milestones.
Cognitive
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Recognizes people and objects at a distance
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Experiments with object permanence (objects and people that are out of sight still exist)
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Curious about objects just out of reach; reaches for them
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Attaches meaning to certain sights, sounds, and gestures; may be ready to learn baby sign language
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Recognizes and responds to familiar words
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Begins to understand that objects and people have names
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Anticipates what comes next in familiar routines (running water means a bath)
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May be able to understand and play clapping games
Motor
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Learns to use thumb and index finger to pick up small objects (pincer grasp)
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Holds an object in each hand
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Bangs objects on a table, floor, or against each other
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Voluntarily lets go of toys
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Feeds self, though messily
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Drinks from a cup
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Sits without support
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Scoots or begins to crawl
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May stand using furniture for support
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May pull self to standing position
Communication
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Looks for and reacts to sounds outside his line of vision
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Babbles echo actual words and include vowels and consonants (“ba ba ba,” “da da,” “bah-dah”)
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Takes turns mimicking conversation (you talk, he babbles, you talk, he babbles
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Expresses likes and dislikes with clear body language (smiling and kicking when happy, frowning when unhappy)
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Vocalizes feelings with squeals, howls, and other sounds
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May wave good-bye
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Able to learn some baby sign language
Social
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Distinguishes between strangers and family
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May show shyness or fear around strangers
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Shows frustration when limits are set
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Tests limits and watches for your response
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Enjoys peekaboo and other simple game