TABLE 1.

Kinetics of embryo development in cytoplasmic string containing (CS+) and not containing (CS-) groups.

	CS+ (hour)	CS-(hour)	p-value
tPNf	22.9 ± 3.1	23.3 ± 2.7	0.48
t2	25.5 ± 3.2	25.8 ± 2.8	0.56
t3	34.9 ± 4.8	35.2 ± 4.7	0.69
t4	36.9 ± 4.5	36.1 ± 4.9	0.69
t5	46.7 ± 8.2	47.1 ± 8.2	0.72
t8	55.8 ± 8.2	57.2 ± 9.4	0.51
tM	85.2 ± 7.6	85.2 ± 7.4	0.93
tsB	96.2 ± 6.8	99.2 ± 6.4	<0.01
tB	103.9 ± 7.7	107.6 ± 7.0	<0.01

Data are mean ± SD.

tPnf: time of pronuclei fading.

t2: time to the 2-cell stage.

t3: time to the 3-cell stage.

t4: time to the 4-cell stage.

t5: time to the 5-cell stage.

t8: time to the 8-cell stage.

tM: time of end of compaction.

tsB: time of initiation of blastulation.

tB: time to full blastocyst stage.