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    Key Development Points for Six-Month-Old Babies

    Updated on November 27, 2025
    eyeem-100009674-133486769_520x500_10838d8c-646c-45a8-9525-30b3a3c0d9cf - Mustela Hong Kong - 1
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    Six months have passed since you welcomed your little one. In just six short months, your fragile newborn has transformed into a happy, talkative baby, full of curiosity about the world around them. Enjoy this wonderful time filled with laughter and exploration, as your baby constantly smiles, cries, discovers, and tries new things.

    Height and weight

    A six-month-old baby typically weighs between 6 and 9 kilograms. Growth slows slightly compared to the first few months of life, and most babies are between 62 and 72 centimeters tall. If your baby hasn't reached this range yet, don't worry: as long as they continue to grow steadily without stopping or losing weight, everything is fine.

    Early Learning

    The baby is fascinated by his reflection in the mirror, though he doesn't yet realize it's himself! He spends a lot of time playing with toys, especially those that are brightly colored, soft, or have music and lights. But his favorite game remains peek-a-boo: when you cover an object (or his face) with a cloth and then reveal it, the baby responds excitedly. Overall, the baby enjoys interacting with you, trying to get your attention, laughing, imitating actions, and making happy sounds. He will babble and enjoy repeating syllables ending in "a": "dadadada," "mamamama." These sounds don't have specific meaning for the baby; you gradually give them meaning, building connections through responses. He likes to appear when you say "Mama's here" and associates "mamamama" with you. This is how he begins to understand the symbolism of language: words are associated with things.

    Action skills