Table 2.

Spearman correlations between kisspeptin and semen parameters.

		Kisspeptin A, pg/ml	Kisspeptin B, ug/ml	Total kisspeptin, ug	Sperm concentration, 106/ml	Semen volume, ml	Total sperm number, 106	Progressive motility, %	Total motility, %	Total motile sperm count, 106	Sperm morphology, %
Kisspeptin A, pg/ml	Coefficient	1	-0.056	-0.043	-0.060	0.010	-0.062	-0.003	-0.017	-0.064	0.062
	P		0.171	0.290	0.135	0.811	0.121	0.937	0.682	0.111	0.123
	N	626	596	593	618	619	619	619	619	619	616
Kisspeptin B, ug/ml	Coefficient		1	0.883∗∗	0.124∗∗	-0.104∗∗	0.066	0.006	-0.029	0.055	-0.017
	P			≤0.001	0.002	0.009	0.099	0.879	0.475	0.171	0.675
	N		631	626	626	627	627	627	627	627	625
Total kisspeptin, ug	Coefficient			1	0.061	0.332∗∗	0.230∗∗	-0.011	-0.048	0.194∗∗	-0.029
	P				0.127	≤0.001	≤0.001	0.778	0.227	≤0.001	0.474
	N			626	625	626	625	625	625	625	621

Kisspeptin A: kisspeptin in blood plasma; Kisspeptin B: kisspeptin in seminal plasma; ∗∗: P<0.01.