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Table 1 Testicular volume (ml) was determined for each male prior to the beginning of the study

From: The efficacy of ultrasound treatment as a reversible male contraceptive in the rhesus monkey

Method Animal Avg. Testicle Vol (ml) % Inhibition of Total Sperm Count
Cup 1 25.1 94.1%
  2 32.1 76.9%
Direct 3 35.7 No Inhibition
  4 17.8 49.7%
  1. The % inhibition of total sperm count with treatment was determined for each male by dividing the average total sperm count derived from the first three evaluations following US treatment by the average total sperm count derived from the three pre-treatment semen evaluations x 100.