Before birth - even before birth a baby has started to become acclimatized to the sounds of its native language.
Crying - A baby expresses itself vocally through crying.
Vegative - crying, coughing and sucking are sounds of discomfort or relflex actions.
Cooing - Comfort sounds / vocal play = hard consonants and vowels produced as well as pitch and loudness.
Phonemic expansion and contraction - The variety of sounds intially increases and then reduced to the sounds of the main language.
Holophrastic - One word utterances are to develop.
Over extension - Where the word used to label something is stretched to include things that aren't normally part of the words meanings.
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