Summary
The testis starts to descent at four months and is located in the scrotum at six months. The weight of the testis increases about 63-fold and is more correlated to the body weight than the CVR length. The sex cords increase in diameter about twofold and show a stagnant period between the fifth and ninth months. The number of the indifferent supporting cells and goncytes increases with age; however, there is a lag in the proliferation of the indifferent supporting cells between the fifth and the ninth months. At ten months some gonocytes show degenerative changes. Pre-Leydig and young Leydig cells are found in the intertubular spaces at three months and differentiate to mature Leydig cells at four months.
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Abdel-Raouf, M., El-Naggar, M.A. & Fateh El-Bab, M.R. The development of the fetal testis in the buffalo. Z. Anat. Entwickl. Gesch. 144, 227–236 (1974). https://doi.org/10.1007/BF00519778
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DOI: https://doi.org/10.1007/BF00519778