Research Article
Effects of a Commercial Canine Gonadotropin Releasing Hormone Vaccination on Intact Male Llamas and Alpacas
Table 1
The criteria used for scoring changes within the seminiferous epithelium of vaccinated llamas at each time point, adapted from Yoshida et al. [
10].
| Score | Criteria |
| 12 | Many late spermatids or spermatozoa (10) present | 11 | Only a few late spermatids or spermatozoa (<10) present | 10 | No spermatozoa and no late spermatids, but many round spermatids (10) present | 9 | No spermatozoa and no late spermatids, but only a few round spermatids (<10) are present | 8 | No spermatozoa and no spermatids, but many secondary spermatocytes (10) are present | 7 | No spermatozoa and no spermatids, but only a few secondary spermatocytes (<10) are present | 6 | No spermatozoa, no spermatids, no secondary spermatocytes, but many primary spermatocytes (10) are present | 5 | No spermatozoa, no spermatids, no secondary spermatocytes, but only a few primary spermatocytes (<10) are present | 4 | No spermatozoa, no spermatids, no spermatocytes, many spermatogonia (>10) are present | 3 | Only germ cells present are a few spermatogonia (<10) | 2 | Absence of germ cells, but Sertoli cells are present | 1 | Total absence of cells in tubular section |
|
|