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(A) In <5C and 5–6C groups, FR was the main cause of blastomere loss when compared to other groups (P < 0.01). (B) Comparing to 7–8C embryos, DC became the leading abnormal behavior in 9–10C and >10C groups, P < 0.01 respectively. FR: fragmentation; DC: direct division; NB: normal behavior.
