精液参数

≤30岁(n = 10,549)

31~40岁(n = 15,166)

41~50岁(n = 1943)

>50岁(n = 191)

精液量(mL)

3.2 (2.5~4.4)

3.2 (2.5~4.3)^a

3.0 (2.0~4.0)^ab

2.3 (1.6~3.1)^abc

精子浓度(×10⁶/mL)

41.3 (21.1~68.8)

42.7 (21.7~71.4)^a

46.3 (23.6~79.8)^ab

39.1 (21.9~66.1)^c

精子总数(×10⁶/一次射精)

136.0 (65.2~236.2)

136.0 (64.7~240.6)

128.5 (62.0~230.6)^b

91.8 (39.7~161.0)^abc

精子总活力(%)

46.5 (30.2~60.6)

43.7 (27.9~58.3)^a

39.4 (23.9~54.2)^ab

26.2 (13.4~39.5)^abc

前向运动精子百分率(%)

37.6 (22.7~51.3)

34.9 (20.7~48.6)^a

30.6 (17.4~44.5)^ab

19.2 (8.6~30.7)^abc

正常形态精子百分率(%)

4.39 (2.96~5.88)

4.37 (2.96~5.8)^a

4.33 (2.96~5.45)

3.47 (2.44~5.17)^abc