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Table 5 Embryonic and pregnancy outcomes after single vitrified-warmed blastocyst transfer, stratified by the value of dBMov/(t3-t2)

From: Blastomere movement post first cell division correlates with embryonic compaction and subsequent blastocyst formation

  No. of embryos Female age Male age Blastocysts Expanded blastocysts No. of blastocysts transferred Clinical pregnancy Ongoing pregnancy Follow-up data on live birth Live birth
Group A [dBMov/(t3-t2) < 0.217] 208 39.1 ± 0.2 41.0 ± 0.4 170 (81.7)a 165 (79.3)a 121 58 (47.9) 48 (39.7) 72 27 (37.5)
Group B [0.217 ≤ dBMov/(t3-t2) < 0.300] 243 39.2 ± 0.2 41.2 ± 0.3 190 (78.2)a 178 (73.3)a, b 125 62 (49.6) 56 (44.8) 62 21 (33.9)
Group C [0.300 ≤ dBMov/(t3-t2) < 0.420] 232 38.9 ± 0.2 40.6 ± 0.3 178 (76.7)a 160 (69.0)b, c 118 51 (43.2) 42 (35.6) 55 19 (34.6)
Group C [0.420 ≤ dBMov/(t3-t2)] 283 39.1 ± 0.2 41.4 ± 0.4 193 (68.2)b 178 (62.9)c 132 63 (47.7) 55 (41.7) 57 21 (36.8)
  1. Categorical data are presented as n (%), continuous data are presented as mean ± standard error of the mean. Abbreviations: dBMov/(t3-t2), duration of blastomere movement during the 2-cell stage. Different superscript letters indicate a significant difference at P < 0.05