P–304 The endometrial preparation protocol does not affect the live-birth-rate after vitrified-warmed euploid single blastocyst transfers: an analysis of 1884 procedures von Petriglia, C, Vaiarelli, A, Cimadomo, D, Gentile, C, Fiorini, F, Sansone, A, Uher, P, Masip, M Aur, Chelo, E, Pellegrini, S, Ubaldi, N, Gennarelli, G, Revelli, A, Brodin, T, Ubaldi, F M

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