These stages comprised the spermatogonia, 5 stages of spermatocytes, the secondary spermatocytes
, 5 stages of spermatids, and the spermatozoa.
Marked decrease in the germ cell counts specially the number of secondary spermatocytes
and rounded spermatid reduced the testis weight (Bone et al.
Based on cell size and nuclear characteristics, the present study revealed 10 stages of spermatogenic cells: spermatogonia, 5 stages of primary spermatocyte, secondary spermatocyte
, 2 stages of spermatid, and spermatozoa.
281 consisting of germ cysts in all stages of development (spermatogonia, primary and secondary spermatocytes
Males The gonads of immature males (n=11) were small and compact and while contained the basic structure of an immature female, also had crypts of primary and secondary spermatocytes
and spermatids (Fig.
5 g/kg) led to significant increase in body weight gain (g), reproductive parameters (seminiferous tubules thickness and diameters, account of spermatogonia, primary and secondary spermatocytes
, spermatids, free spermatozoa, account of sertoli and Leydig cells, diameter of Leydig cells and the height of epithelial cells entirely covered epididymal caudal), hormones (testosterone and follicle stimulating hormone) as well as protein concentration .
tuberosum treatment, effects on secondary spermatocytes
and round spermatids was assessed, elongated spermatids at 14 days treatment, spermiation and sperm transit through epididymis at 7 days treatment (Pina-Guzman et al.
The sertoli cells, spermatogonia, secondary spermatocytes
and spermatids were counted under 100x magnification.
Three stages were observed: (1) Regressed, the germinal epithelium of the seminiferous tubules is reduced to one or two layers of spermatogonia and Sertoli cells; (2) Recrudescence, there is a proliferation of primary and secondary spermatocytes
for the upcoming period of spermiiogenesis; (3) Spermiogenesis, seminiferous tubules are lined by sperm and/or clusters of metamorphosing spermatids.
Sertoli cells, spermatogonia, primary spermatocytes, secondary spermatocytes
and round spermatids were count ed under 100* magnification using ocular and stage micrometer from twenty randomly selected seminiferous tubules from each slides.
During first meiotic division, the X and Y, in spite of the kinds of pairing involving XR and Y, remain together until early anaphase, at which time they segregate and move to opposite poles, giving rise to two kinds of secondary spermatocytes
with neo-X or neo-Y, but with the same chromosome number.
Number of spermatogonia, primary spermatocytes, secondary spermatocytes
and round spermatids decreased significantly [P<0.