Table 6.

Correlation analysis between baseline characteristics and clinical pregnancy

Variables	Pearson’s coefficient	P-value
Male age	−0.099	0.013
Infertility years	−0.073	0.064
Smoking amount	0.027	0.504
Abstinence days	−0.02	0.613
Sperm volume	−0.069	0.080
Sperm concentration	0.093	0.020
Total sperm amount	0.072	0.069
Normal sperm morphology rate	−0.001	0.975
Progressive motility rate	0.071	0.074
Total sperm motility	0.069	0.082
Female age	−0.127	0.001
Obesity	ref	ref

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