Table 3.

Morphokinetic events (in hours) of all embryos obtained from women with high (15 or more retrieved oocytes) and normal (6–14 retrieved oocytes) ovarian response following the exclusion of direct uneven cleavage embryos

Parametera	High response	Normal response	p value
No. of embryos	950	2556
t2	2.5 ± 0.8	2.5 ± 0.9	0.064
t3	14.6 ± 2.6	14.8 ± 2.8	0.059
t4	15.7 ± 3.4	15.8 ± 3.8	0.222
t5	26.6 ± 6.3	27.1 ± 6.5	0.056
t8	34.9 ± 8.2	34.9 ± 8.5	0.952
tM	62.4 ± 9.8	63.3 ± 10.0	0.095
tSB	76.2 ± 7.9	76.2 ± 8.4	0.970

Data presented as Mean ± SD

^aTime of pronuclei fading was used as the 0 time

t(N), cleavage of N discrete cells; tM, time to morula; tSB, time to start of blastocyst formation