In cryopreserved-warmed cleavage-stage embryo transfer cycles, the decision to perform DET instead of SET should not be based on embryo criteria (Thurin et al., 2004; Hydén-Granskog et al., 2005; Le Lannou et al., 2006; Salumets et al., 2006; Moustafa et al., 2008; López Regalado et al., 2014; Racca et al., 2020; Zhu et al., 2020).

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