The Vietnamese pot-bellied pig is a breed with high investigation potential. However, at the reproductive level, its testicular characteristics are still unknown, as well as the different stages of its development. Therefore, the objective of this work is to describe the postnatal testicular development of Vietnamese pot-bellied pigs. In this study, we used pigs grouped into the neonatal stage, animals at zero weeks; prepubertal stage, animals at three and eight weeks; pubertal stage, animals at twelve and sixteen weeks; and postpubertal stage animals at twenty, twenty-four, twenty-eight and thirty-two weeks of age. The neonatal stage is characterized by gonocytes at different migration phases. In the prepubertal stage, gonocytes were differentiated into spermatogonia at 3 weeks of age, and the first spermatocytes were observed at 7 weeks of age. Puberty was determined to start at 12 weeks because seminiferous tubules are found with complete spermatogenesis and the highest peaks in positive cell counting of androgen receptors (AR) and proliferating cell nuclear antigen (PCNA) factor that later decreased and further stabilized in the following weeks. In the postpubertal stage, an increase in seminiferous tubule areas was observed. The number of apoptotic cells ranged from low to null at all ages. Testosterone (T) and gonadotropin levels had two important peaks at 3 and 24 weeks. The seminiferous epithelium cycle was found to have 11 stages according to acrosome development. These characteristics of Vietnamese pot-bellied pig testes, which are different from rat testes and more similar to human testicles, make them a viable model to study human male reproductive biology. The postnatal testicular development of pot-bellied pigs is different from the postnatal testicular development of other breeds. Therefore, due to this difference in size and easy manipulation, the Vietnamese pig is an alternative for investigation compared to other pig breeds.

越南大肚猪是一个具有很高调查潜力的品种。然而，在生殖水平上，它的睾丸特征以及其发育的不同阶段仍然未知。因此，这项工作的目的是描述越南大肚猪的产后睾丸发育。在这项研究中，我们使用了分为新生阶段的猪，零周的动物；青春期前阶段，三周和八周的动物；青春期，十二周和十六周的动物；以及二十、二十四、二十八和三十二周龄的青春期后阶段的动物。新生儿期的特点是生殖细胞处于不同的迁移阶段。在青春期前阶段，3周龄时生殖母细胞分化为精原细胞，7周龄时观察到第一个精母细胞。青春期被确定为从第 12 周开始，因为发现生精小管具有完整的精子发生，并且雄激素受体 (AR) 和增殖细胞核抗原 (PCNA) 因子的阳性细胞计数达到最高峰，随后下降并在接下来的几周内进一步稳定。在青春期后阶段，观察到曲细精管面积增加。在所有年龄，凋亡细胞的数量从低到零不等。睾酮 (T) 和促性腺激素水平在 3 周和 24 周有两个重要的峰值。根据顶体发育，发现生精上皮循环有11个阶段。越南大肚猪睾丸的这些特点，与大鼠睾丸不同，更类似于人类睾丸，使其成为研究人类雄性生殖生物学的可行模型。大肚猪的产后睾丸发育不同于其他品种的产后睾丸发育。因此，由于这种大小差异和易于操作，与其他猪品种相比，越南猪是一种可供研究的替代品。