ðˈʌs ðə kˈɑːnsɛpt ʌv lˈaɪf kˈoːɹs ɪmplˈaɪz ˈeɪdʒdˌɪfɚɹˈɛnʃɪˌeɪɾᵻd sˈoʊʃəl fɪnˈɑːmɪnə dɪstˈɪŋkt fɹʌm jˈuːnɪfˌɔːɹm lˈaɪfsˈaɪkəl stˈeɪdʒᵻz ænd ðə lˈaɪf spˈæn.
Thus the concept of life course implies age-differentiated social phenomena distinct from uniform life-cycle stages and the life span.