Table 1. In a routine evaluation, patient A had been classified as 'fertile' and patient B as 'infertile'. In reality, B has a testicular function that is four times better than that of A.
| Patient | A | B |
|---|---|---|
| Concentration of spermatozoa (million mL−1) | 30 | 10 |
| Volume (mL) | 2 | 6 |
| Total number of spermatozoa (million) | 60 | 60 |
| Abstinence (days) | 5 | 2 |
| Number of spermatozoa per day (million) | 12 | 30 |
| Testis size (mL) | 20 + 20 | 12 + 12 |
| Number of spermatozoa per day per mL testis volume (million) | 0.3 | 1.25 |