baɪ dˌuːɪŋ ðˈɪs, dˈɑːktɚz kæn tɹˈæk ɐ tʃˈaɪldz ɡɹˈoʊθ ˌoʊvɚ tˈaɪm ænd mˈɑːnɪɾɚ hˌaʊ ɐ tʃˈaɪld ɪz ɡɹˈoʊɪŋ ɪn ɹᵻlˈeɪʃən tʊ ˈʌðɚ tʃˈɪldɹən.
By doing this, doctors can track a child's growth over time and monitor how a child is growing in relation to other children.