Supplementary Table 2.

Causes of infertility of the studied subjects

	CT+ (n=386), n (%)	CT− (n=6,506), n (%)
Mycoplasma infection	11 (2.57)	90 (1.34)
Other genital tract infections	8 (2.01)	110 (1.63)
Chronic prostatitis	10 (2.45)	171 (2.54)
Obesity	8 (2.01)	151 (2.24)
Varicocele	26 (6.32)	232 (3.44)
Hereditary factors	2 (0.57)	79 (1.17)
Oligozoospermia	109 (26.21)	1169 (17.35)
Asthenozoospermia	25 (6.03)	1161 (17.23)
Teratozoospermia	36 (8.62)	1005 (14.91)
Asthenoteratozoospermia	20 (6.9)	256 (3.80)
Oligoteratozoospermia	22 (5.17)	228 (3.39)
Oligoasthenoteratozoospermia	25 (6.03)	360 (5.34)
Others	104 (25.11)	1726 (25.62)

CT+: Chlamydia trachomatis positive; CT−: Chlamydia trachomatis negative