Age of animals No. of animals WT(g) VT(cm3) Vp(cm3) VTu(cm3) VIT(cm3)  Neonatal animals  (5 days) 3 5.5 ± 0.3 5.0 ±0.2 4.45 0.57 3.88 Early suckling animals (2 months) 4 6.5 ±0.4 6.0 ±0.3 5.34 1.74 3.60 Late suckling animals (6 & 9 months) 4 6.9 ±0.6 6.5 ± 0.2 5.79 2.44 3.35 Premature animals (1.5 years) 4 40.0 ± 3.6 45.0 ± 3.1 40.05 31.23 8.82 Mature animals (2-3 years) 5 95.5±8.5 100.0 ± 6.2 89.00 69.80 19.20

Values of testicular weight and volume are represented by means ± standard deviation (SD). Abbreviations: WT, testicular weight; VT, testicular volume; Vp, parenchymal volume; VTu, tubular volume; VIT, volume of interstitial testicular tissue.

Table 1: Quantitative analysis of postnatal testicular development in donkeys.