Single melatonin injection enhances the testicular artery hemodynamic, reproductive hormones, and semen parameters in German shepherd dogs

Table 4 Correlation coefficients between testicular blood flow waveform (distal -supra- branch) measurements and semen analysis parameters in MEL dogs (n = 6)

Paired measurement	Pearson Correlation coefficients
DSTa PI × Scrotum circumference	-0.724^*
DSTa PI × Testicular volume	-0.421^**
DSTa PI × Intra testicular colored area	-0.405^*
DSTa PI × Testosterone	-0.627^**
DSTa PI × Estradiol 17-ß	0.711^**
DSTa PI × NO	-0.499
DSTa PI × PSV	-0.742^**
DSTa PI × EDV	-0.776^*
DSTa RI × Scrotum circumference	-0.774
DSTa RI × Testicular volume	-0.848^*
DSTa RI × Intra testicular colored area	-0.624^*
DSTa RI × Testosterone	-0.455^**
DSTa RI × Estradiol 17-ß	0.921^**
DSTa RI × NO	-0.475^*
DSTa RI × PSV	-0.844^*
DSTa RI × EDV	-0.741^*

^*Means significant at 5%
^**Means significant at 1%
PI pulsatility index, RI resistance index, PSV peak systolic velocity, EDV end diastolic velocity, NO nitric oxide, and DSTa Distal supra testicular artery

ISSN: 1746-6148