Conclusions

This preliminary observational study provides ultrastructural descriptions of the developing human fetal testis, including the morphology of Leydig cells, Sertoli cells, and fetal germ cells, thereby contributing to the limited available data on normal fetal testicular development. These observations may serve as a morphological reference for future studies investigating normal and abnormal testicular development. Further research involving larger sample sizes and molecular techniques will be required to better understand the mechanisms underlying testicular development and associated pathological conditions.