ðɪs bɹˈæntʃ ɪz nˌɑːt kˈɑːnstənt, bˌʌt ɪz mˈoːɹ kˈɑːmənli fˈaʊnd ɔnðə ɹˈaɪt sˈaɪd; wˌɛn ˈæbsənt, ɪts plˈeɪs ɪz səplˈaɪd baɪ ɐn ˌɪntɚkˈɔstəl bɹˈæntʃ fɹʌmðɪ eɪˈoːɹɾə.
This branch is not constant, but is more commonly found on the right side; when absent, its place is supplied by an intercostal branch from the aorta.