-The objective of this study was to characterize the sexual development in Anglo-Nubian male goats raised in semi-intensive system. Eight animals were monitored every fifteen days, from the 12 th to the 44 th week for age at penis detachment, live weight, scrotal circumference, seminal parameters (volume, aspect, concentration, wave motion, progressive individual motility, vigor and spermatic abnormalities) and serum testosterone levels. Serum testosterone levels were determined in blood samples collected at the 20 th , 28 th and 38 th weeks of age. Penis detachment occurred at 102.9 ± 15.4 days of age. Live weight and scrotal circumference at 20 th and 44 th weeks of age ranged from 25.9 ± 3.5 to 44.7 ± 4.7 kg and from 21.2 ± 1.6 cm to 26.0 ± 1.5 cm, respectively. The ejaculate volume ranged from 0.38 ± 0.05 to 0.96 ± 0.04 mL, concentration ranged from 1.33 ± 0.64 to 3.54 ± 0.14.10 9 mL -1 and the progressive individual motility varied from 48.0 ± 10.52% to 82.0 ± 3.74%, at the same age. The number of defective spermatozoa (major and minor) was 32.2 ± 5.8% vs. 8.80 ± 2.9% at the 20 th and the 44 th week of age, respectively. Serum testosterone level was 2.70 ± 1.40 ng.mL -1 at the 20 th week, 8.50 ± 4.66 ng.mL -1 at the 28 th week and 2.21 ± 2.28 ng.mL -1 at the 38 th week of age. Age showed a correlation with live weight, scrotal circumference, and all the qualitative parameters of semen except for volume, with all other qualitative parameters of semen, and the correlation among sperm abnormalities and the other traits was negative. Serum testosterone levels and andrological parameters of Anglo-Nubian goats raised in semi-intensive system are closely related to age. In those animals, puberty is reached at the 20 th week and sexual maturity is reached at the 38 th week of age.