FIRST STAGES OF CLA

Stage	Description
Babbling 24-36 weeks	Repetitive CV patterns
Holophrastic   36 - 72 weeks	Single open-class words or word stems
Two-word-stage   72 - 96 weeks	Mini-sentences with simple semantic relations
Telegraphic     96 - 120 weeks	Telegraphic sentence structures rather than functional
Post-telegraphic    120+ weeks	Grammatical or functional structures

(From: http://www.ling.upenn.edu/courses/Fall_2015/ling001/acquisition.html)

Stage 1: variations of crying soumds, coughing rhythmically, spluttering etc.

(0-8 weeks)

Stage 2: cooing and laughing, musical noises, often diphthongs that are syllable equivalents

(8-20 weeks)

Stage 3: vocal play consisting of longer sounds

(20-30 weeks)

Stage 4: babbling, mamamamama, babababababa, replicating monosyllables

(25-50 weeks)

Stage 5: melodic utterances, more rhythm and tone

(9-18 months)

(From: https://aggslanguage.wordpress.com/child-language-acquisition-revision/)