Table 1.

Studies reporting sperm concentrations in different areas in Asia

Fertility status	Authors (reference)	Year of publication	Location/Country	No. subjects	Mean sperm concentration (×106/mL)
Normal men (unknown fertility)	Ikegaki et al. 36	1984	Sapporo/Japan	254	71
	Wang et al. 17	1985	Hong Kong	1157	84
	Ito et al. 25	2001	Sapporo/Japan	457	80
	Junquing et al. 37	2002	Seven areas†/China	562	55
	Danadevi et al. 38	2003	South India/India	57	63
	Gao et al. 39	2007	Six areas‡/China	1191	65¶
Fertile men	Wang et al. 17	1985	Hong Kong	82	71
	Aribarg et al. 18	1986	Bangkok/Thailand	307	53
	Chia et al. 40	1998	Singapore	243	45§
	Baba et al. 41	2000	Kawasaki & Yokohama/Japan	255	108
	Pal et al. 42	2007	New Delhi/India	368	68

^† Shanghai, Henen, Zhejiang, Shanxi, Shandon, Hebei and Guizhou.

^‡ Hebei, Henen, Shanxi, Zhejiang Qindao and Guizhou.

^§ Geometric mean.

^¶ Median.