Table 1.

Comparison of developmental timing between human blastocysts and arrested embryos groups by analysis of time‐lapse monitoring

Total no. of pronuclei embryos	963		P
Developmental groups	Blastocysts	Arrested embryos	–
No. of embryos (%)	492 (51.1)	471 (48.9)
Developmental time (h)
Pronuclei appearance [range]	9.1 [4.0‐16.7]	9.3 [4.4‐17.9]	NS
Pronuclei breakdown [range]	22.2 [16.5‐34.8]	24.0 [16.3‐56.7]	<.01
Two cells [range]	25.0 [18.7‐38.2]	26.5 [19.2‐51.8]	<.01
Compacted morula [range]	90.4 [54.9‐129.7]	96.8 [68.5‐142.1]	<.01
Regular blastocyst [range]	112.5 [85.4‐166.8]	–	–

Abbreviation: NS, not significant.