Table 4.

Mean and standard error (SEM) number of canine spermatozoa bound to the zona pellucida (NBZ); comparison between mature and senile dogs, and post-thaw kinematic parameters in mature (n = 10), and senile (n = 10) groups.

Parameters	Mature	Senile	P-valuea
NBZ	14.7 ± 2.0	7.3 ± 2.0	0.016
Total motility PT (%)	53.5 ± 2.6	20.8 ± 2.6	< 0.001
Progressive motility PT (%)	37.1 ± 1.9	8.0 ± 1.9	< 0.001
VAP PT (µm/s)	88.5 ± 2.6	61.7 ± 2.6	< 0.001
VSL PT (µm/s)	82.7 ± 1.2	51.6 ± 1.6	< 0.001
VCL PT (µm/s)	129.0 ± 3.9	115.0 ± 3.9	0.030
SLOW PT (%)	5.8 ± 0.7	8.4 ± 0.7	0.022
STATIC PT (%)	55.2 ± 4.9	73.8 ± 4.9	0.016

^aRepeated measures ANOVA.

NBZ = mean number of spermatozoa bound to zona pellucida.

PT = post-thaw.

VAP = average path velocity.

VSL = straight line velocity.

VCL = curvilinear velocity.

SLOW = slowly motile spermatozoa.

STATIC = static sperm.