For both sexes, significantly (P < 0.05) higher GCA values occurred during the ripening stages (postvitellogenesis and
spermiogenesis) and minimum values during the partial spawning and quietness stages (undifferentiated and spent).
Spermiogenesis in Psilochorus simoni (Berland, 1911) (Pholcidae, Araneae): evidence for considerable within-family variation in sperm structure and development.
Month n Regressed Recrudescent
Spermiogenesis May 2 0 0 2 June 6 0 0 6 July 1 0 0 1 August 5 2 0 3 September 1 0 0 1 October 3 1 0 2 November 1 1 0 0 Table 2.
In rats, other effects have been related to CBZ exposure in vivo, such as a decrease in spermatid number and sperm motility, morphological abnormalities, failure of
spermiogenesis, and infertility (Rama et al., 2014).
Structural comparison between eupyrene and apyrene
spermiogenesis in Calpodes ethlius (Hesperiidae, Lepidoptera).
However, it is known that small increases in the amount of ROS in the testis can lead to exacerbation of apoptosis process not only during spermatocytogenesis, but also during
spermiogenesis [6], which constitutes the later stages of spermatogenesis.
[sup][7] Although the exact mechanism of acrosomal absence was not clear, one common view is that globozoospermia likely originates during
spermiogenesis. Here, we found that acrosomeless sperm and small-acrosomal sperm were the overwhelming types of cells in partial globozoospermia.
Ten individuals were found in the growth stage (
spermiogenesis), which showed a dominance of spermatids and a considerable amount of sperm, spermatocytes and spermatogonia (Fig.
The spermatids subsequently undergo a morphological and molecular remodeling process, known as
spermiogenesis, during which the head, middle piece, and flagellum of the spermatozoa differentiate (Eddy, 2006).
The testicular histological profile of the control group shows seminiferous tubules filled with sperm, lined by epithelium consisting of two cell types; the cells in different stages of spermatogenesis and
spermiogenesis, which are called spermatogenic cells and Sertoli cells (Fig.
Fertility in mice require X-Y pairing and a Y chromosomal"
spermiogenesis" gene mapping to the long arm.
Nuclear vacuoles may be the remnants of unnecessary cytoplasm and organelles that should have been eliminated during
spermiogenesis [36, 37].