No.

Age (year)

Testes length × width (cm)

Semen volume (ml)

Sperm concentration (×10⁶/ml)

1

4

3.4 × 1.9

0.25

0

2

4

3.5 × 1.8

0.25

0

3

3

3.2 × 1.8

0.2

0

4

7

4.0 × 2.0

0.2

10^*

5

5

3.8 × 1.8

0.2

41^**