Table 8.

Correlation analysis between baseline characteristics and live birth

Variables	Pearson’s coefficient	P-value
Male age	−0.123	0.002
Infertility years	−0.093	0.018
Smoking amount	0.019	0.636
Abstinence days	−0.017	0.669
Sperm volume	−0.047	0.240
Sperm concentration	0.072	0.069
Total sperm amount	0.064	0.108
Normal sperm morphology rate	0.024	0.550
Progressive motility rate	0.078	0.049
Total sperm motility	0.074	0.061
Female age	−0.156	0.000
Obesity	ref	ref

E₂, estrogen; TE₂, testosterone–estradiol ratio, T/E₂; TSI, testosterone secretion index, T/LH.