Faster Fertilization and Cleavage Kinetics Reflect Competence to Achieve a Live Birth: Data from Single-Embryo Transfer Cycles

Table 3

Morphokinetic parameters of all embryos produced in different maternal age groups.

20-25 (y)			26-30 (y)		31-36 (y)		≥37 (y)
Parameter	LB	NLB	LB	NLB	LB	NLB	LB	NLB
tPNf (hrs.)	^NS; ()	^NS; ()	^a; ()	^a; ()	^c; ()	^c; ()	^NS; ()	^NS; ()
t2 (hrs.)	^NS; ()	^NS; ()	^b; ()	^b; ()	^c; ()	^c; ()	^NS; ()	^NS; ()
t3 (hrs.)	^a; ()	^a; ()	^a; ()	^a; ()	^a; ()	^a; ()	^NS; ()	^NS; ()
t4 (hrs.)	^NS; ()	^NS; ()	^a; ()	^a; ()	^a; ()	^a; ()	^NS; ()	^NS; ()
t5 (hrs.)	^NS; ()	^NS; ()	^NS; ()	^NS; ()	^NS; ()	^NS; ()	^NS; ()	^NS; ()
t8 (hrs.)	^NS; ()	^NS; ()	^a; ()	^a; ()	^NS; ()	^NS; ()	^NS; ()	^NS; ()

hrs.: hours; LB: live birth achieved; NLB: live birth not achieved; tPNf: time of pronuclear fading; ^a; ^b; ^c; ^NS.