Table 1. Morphokinetics parameters evaluated for their capacity to identify the quality of blastocyst. Adapted from Storr et al. (2015).
Parameter	Definition
Pntl	Time of pronuclei formation
NEBD	Nuclear envelope break down
Cytokinesis	First cytokinesis
t2	Time of cleavage to a two-cell embryo
t3	Time of cleavage to a three-cell embryo
t4	Time of cleavage to a four-cell embryo
t5	Time of cleavage to a five-cell embryo
t6	Time of cleavage to a six-cell embryo
t7	Time of cleavage to a seven-cell embryo
t8	Time of cleavage to a eight-cell embryo
tM	Time to full compaction
tSB	Time to the first signs of blastulation
tB	Time to full blastocyst
tEB	Time to expanded blastocyst
tHB	Time to hatching blastocyst
s1	Time between NEBD and subsequent division to two cells
s2	Time between division to three cells and subsequent division to four cells
s3	Time between division to five cells and subsequent division to eight cells
t4 int	Time between division to four cells and subsequent division to five cells
t5-t2	Time between division to two cells and subsequent division to five cells
cc2	Duration of the second cell cycle
cc3	Duration of the third cell cycle