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Table 4 Testis temperatures and sperm parameters from Study 1

From: Therapeutic ultrasound as a potential male contraceptive: power, frequency and temperature required to deplete rat testes of meiotic cells and epididymides of sperm determined using a commercially available system

Group Treatment n Testis temperature (°C) Sperm count
(106)
Motility
(%)
1 Sham 2 30.1 ± 0.8 380 ± 33 45 ± 3
2 Wet heat 3 42.6 ± 0.1 23 ± 4 22 ± 5.8
3 Low freq., high power 3 40.5 ± 1.2 84 ± 3 § 54 ± 2
4 High freq., high power 3 41.8 ± 0.6 1.9 ± 0.9 0.3 ± 0.3
5 High freq., high power, Na+ 4 nd 1.5 ± 0.8 nd
6 Low freq., low power 3 42.1 ± 2.8 96 ± 17 § 39 ± 2
7 Low freq., low power, Na+ 3 35.4 ± 1.9 51 ± 5 40 ± 2
  1. Sperm analyses were performed two weeks after ultrasound treatment. Average sperm count represents millions of sperm per cauda epididymis ± SEM. % Motility represents the percentage of recovered sperm with forward motility ± SEM. The average maximum testis temperature during treatment is listed in degrees Celsius ± SEM. Not determined (nd). §, statistically greater than the wet-heat control (Group 2) by Tukey's post-test (p < 0.001). , statistically lower than 1 MHz, high power (Group 3) and 1 MHz, low power (Group 6) by Tukey's post-test (p < 0.001).