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A cell of the last or next to the last generation of male germ cells which differentiates to form spermatozoa.



a male sexual cell derived from a spermatogonium. Two types of spermatocytés are distinguished: primary and secondary. Primary spermatocytes develop during the growth period, and secondary spermatocytés during the second meiotic division. The latter subsequently give rise to spermatids.

References in periodicals archive ?
Marked decrease in the germ cell counts specially the number of secondary spermatocytes and rounded spermatid reduced the testis weight (Bone et al.
The numerous possible combinations and morphologies of the chromosomal elements made detailed analysis of secondary spermatocytes (MII) impossible.
At early stage of 2 weeks, TDRD12 was detected in the cytoplasm of primary spermatocyte (Figure 4).
Spermatogenic cell series in seminiferous tubule wall, spermatogonium, primary spermatocytes, spermatid cell, and Sertoli cell were found normal and comparable to the untreated control (Figure 4a-d).
The study was conducted in adult male laboratory mice at three levels: bone marrow cells as a model for mitotic chromosome aberrations, spermatocytes as a model for meiotic chromosomes and sperm count and morphology.
Black perch < 90 mm SL did not have spermatozeugmata within the testicular tissues but all stages of spermatocyte development were present (Fig.
37a Spermatogonia 9,28 [+ or -] 1,62a 9,22 [+ or -] 1,64a type A Pachytene 48,61 [+ or -] 3,74a 49,03 [+ or -] 2,34a spermatocyte Round spermatid 147,11 [+ or -] 4,33a 148,24 [+ or -] 2,83a Parameter TB TC (a) Stages of spermatogenesis I-VI 46.
In particular, the machinery for sperm tail structure and motility is initiated during spermatocyte differentiation, well before the appearance of mature spermatozoa, during meiosis rather than after the completion of meiotic divisions (Shima et al.
In a study, administration of 200 and 300 mg/kg to rats for 60 days showed a significant increase in the number of sperms, sertoli cells, and primary spermatocyte compared to the control group.
Microscopically, seminomas are classified as typical, atypical, or spermatocyte.
Accordingly, the fertilizing spermatozoa in the first week post gamma-irradiation has been in its spermatid stage at the time of irradiation, also gamma-irradiated early spermatid, secondary spermatocyte, early spermatocyte and spermatogonia stages act as a fertilizing spermatozoa in 2nd, 3rd, 4th, 5th and 6th weeks post-irradiation, respectively (53).
In the untreated diabetic rats, hyperglycemia severely damaged the testes morphology as well as the spermatogenic process as evidenced by the: thickness of basement membrane of the seminiferous tubule; mitochondria alteration; abnormal spermatocyte cells displaying polymorphous nuclei, cytoplasmic vacuolization and necrosis; and disorganization and degeneration of sperm germ cells.