Table 1. Timing of developmental events observed through time-lapse images in euploid and aneuploid blastocysts.
Euploid (n=41) Aneuploid (n=43) 95% CI p
n Time (h) n Time (h)
st2 (median) 33 22.6 38 22.3 - 0.8703
t2 (median) 41 24.7 43 25 - 0.4663
t3 (median) 41 36.6 43 36.2 - 0.5762
t4 (mean) 41 37.01 43 37.56 -0,9535 to 2,055 0.4685
t5 (median) 41 46.5 43 49.6 - 0.015
t8 (median) 41 53.8 42 54.55 - 0.4668
tSC (mean) 41 89.22 43 89.86 -3.771 to 5.062 0.5423
tSB (mean) 41 100.3 43 102.2 -2.341 to 6.046 0.3821
tB (mean) 41 108.3 43 112.2 -0.7682 to 8.557 0.2540
t2-st2 (median) 33 2.5 38 2.25 - 0.0236
cc2 (t3-t2) (median) 41 11.2 43 11 - 0.7367
cc3 (t5-t3) (median) 41 11.7 43 13.3 - 0.0046
t5-t2 (median) 41 22.1 43 24.4 - 0.0185
s2 (t4-t3) (median) 41 0.5 43 0.5 - 0.4058
s3 (t8-t5) (median) 41 10.9 42 3.3 - 0.019
tSC-t8 (mean) 41 34.59 42 33.42 -5.724 to 3.386 0.6106
tB-tSB (median) 41 7.6 43 9.9 - 0.0084

Legend: st2, first evidence of cytoplasmic movements prior to the first cell division; t2, t3, t4, t5, t8, time frames during which the embryo attains n number of blastomeres; tSC, time frame when the embryo begins compaction; tSB, time frame when the blastocoel becomes first visible; tB, time frame when the complete blastocyst is formed.