Reptiles, birds and mammals are amniotes, the eggs of which are either laid or carried by the female and are surrounded by several membranes, some of which are impervious.
ɹˈɛptaɪlz, bˈɜːdz ænd mˈæməlz ɑːɹ ˈæmnɪˌoʊts, ðɪ ˈɛɡz ʌvwˈɪtʃ ɑːɹ ˈiːðɚ lˈeɪd ɔːɹ kˈæɹid baɪ ðə fˈiːmeɪl ænd ɑːɹ sɚɹˈaʊndᵻd baɪ sˈɛvɹəl mˈɛmbɹeɪnz, sˌʌm ʌvwˈɪtʃ ɑːɹ ɪmpˈɜːviəs.