Results 201 to 210 of about 20,184 (239)
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Round spermatid nucleus injection (ROSNI)
Fertility and Sterility, 2008This Committee Opinion reviews the unresolved issues and experimental nature associated with the procedure and its limited success rates.
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Multinucleate Spermatids in Aging Human Testes
Archives of Andrology, 1986A comparative morphologic study between the testes of 25 young adult men and 41 elderly men without testicular or related pathological conditions revealed the presence of multinucleate spermatids, showing up to 86 nuclei, in the testes of 3 of the elderly men. The formation of multinucleate spermatids is probably due to cell fusion, since the number of
M, Nistal, J, Codesal, R, Paniagua
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Spermatids: Clinically Useful Gametes?
2000Without doubt, the impact of intracytoplasmic sperm injection (ICSI) on the treatment of male infertility has been revolutionary. In most major fertility centers, close to half of in vitro fertilization (IVF) cases now involve ICSI, and the majority of these cases are performed for male factor infertility.
Fay L. Shamanski +2 more
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1987
The two maturation divisions of each spermatocyte result in four haploid cells, spermatids. These differentiate into spermatozoa, a process called spermiogenesis which ends when the spermatozoa are released from the seminiferous epithelium. After the haploid round spermatids are formed, their nuclear and cytoplasmic components undergo a complex series ...
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The two maturation divisions of each spermatocyte result in four haploid cells, spermatids. These differentiate into spermatozoa, a process called spermiogenesis which ends when the spermatozoa are released from the seminiferous epithelium. After the haploid round spermatids are formed, their nuclear and cytoplasmic components undergo a complex series ...
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[In-vitro differentiation of human testicular round spermatids to elongating spermatids].
Zhonghua nan ke xue = National journal of andrology, 2007To investigate the differentiation of human testicular spermatogenic cells during in vitro culture.Testicular cells of obstructive azoospermic patients' testis biopsies were dispersed employing mechanic methods. Then, (1) mixed testicular cells were applied to in vitro culture, and changes of the ratio of elongating spermatids and all round cells were ...
Zhi-ming, Cai +6 more
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Glycogen in Spermatidic Arrest
1971Glycogen probably plays an important role in the maturation of germinal cells. Intratubular glycogen is abundant in the prepubertal stage; it diminishes remarkably at the beginning of puberty, reappears during the period of complete sexual maturation and the highest increase is found in the tubules in involution.
A. Fabbrini, M. Re, M. Savioli, G. Spera
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Motile components in early rat spermatids
Cell Differentiation, 1981In early rat spermatids, two distinctly different kinds of movements of cell components were detected by video-analysis. The primary flagellum, a typical 9 + 2 axonema, is capable of inducing wave-like movements in three dimensions, unlike late spermatid forms, which display motility of the now thickened flagellum only by repeated bending of its ...
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