Table 2 Semen characteristics of the participants

From: Lysine malonylation regulates human sperm motility

Test

Normozoospermic men (n = 53) Mean ± SEM (range)

Asthenozoospermic men (n = 41) Mean ± SEM (range)

References

Age (years old)

29.2 ± 0.8 (20.0–39.0)

28.9 ± 0.7 (20.0–37.0)

Reproductive age

Semen volume (mL)

3.4 ± 0.2 (1.6–6.1)

3.1 ± 0.2 (1.5–6)

1.5–7

Liquefaction time (min)

<60

<60

<60

pH

7.5 ± 0.03 (7.3–7.9)

7.6 ± 0.03 (7.2–8.0)

7.2–8.0

Sperm count (106 cells/mL)

61.3 ± 4.9 (18.8–147.4)

61.9 ± 3.9 (21.7–142.0)

>15

Viability(%)

70.2 ± 1.2 (52.0–92.0)

66.3 ± 1.8 (45.5–86.0)

>50

Total motility (%)

62.3 ± 1.2 (48.5–87.0)

31.1 ± 1.1*** (15.0–45.0)

>40

Progressive motility (%)

51.0 ± 1.1 (33.0–69.0)

19.8 ± 1.2*** (5.0–31.0)

>32

Morphology (% normal)

8.6 ± 0.2 (5.0–11.7)

8.7 ± 0.2 (5.0–11.6)

>4

  1. The reference limit (Reference) is according to the WHO laboratory manual for the examination and processing of human semen (WHO, 2010). Routine semen analysis was carried out immediately after liquefaction.
  2. SEM standard error of the mean.
  3. ***p < 0.001, unpaired t-test.
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