At first, they feed on the yolks of the eggs, but as this source of nourishment declines they begin to rasp at the ciliated epithelial cells that line the oviduct.
æt fˈɜːst, ðeɪ fˈiːd ɔnðə jˈoʊks ʌvðɪ ˈɛɡz, bˌʌt æz ðɪs sˈoːɹs ʌv nˈɜːɹɪʃmənt dᵻklˈaɪnz ðeɪ bɪɡˈɪn tə ɹˈæsp æt ðə sˈɪlɪˌeɪɾᵻd ˌɛpɪθˈɛlɪəl sˈɛlz ðæt lˈaɪn ðɪ ˈoʊvɪdˌʌkt.