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%