Transfer of human frozen-thawed embryos with further cleavage during culture increases pregnancy rates.

Pregnancy rate according to cleavage Further analysis of ETs with cultured embryos revealed that highly significant PRs were observed when ≥2 cleaved embryos were transferred (42.2%) than when 1 cleaved embryo (16.9%, P =0.0002) or embryos without cleavage were transferred (3.2%, P ≤.0001) [ Table 4 ].

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