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| | Microsurgical TESE and the distribution of spermatogenesis in non-obstructive azoospermia - Sherman J. Silber, M.D. |
 | | However, control studies have shown that for difficult cases of non-obstructive azoospermia, where spermatogenesis is very meagre, needle biopsy is much less likely to find the rare foci of spermatogenesis for ICSI than open biopsy (Friedler et al., 1997; Rosenlund et al., 1998). | | | The theoretical basis for attempting to retrieve spermatozoa for ICSI from the testes of men with apparent absence of spermatogenesis was based on early quantitative histological studies from testicle biopsy in fertile and infertile men (Zuckerman et al., 1978; Silber and Rodriguez-Rigau, 1981). | | | The purpose of the present study was to address questions that remain after our initial quantitative study regarding the distribution of spermatogenesis in azoospermic men, and to outline a microsurgical approach to TESE that is consistent with these findings (Silber et al., 1997). |
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http://www.infertile.com/inthenew/sci/teseopin.htm
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| | EMF-Bioshield® - Experiment results: Human Spermatogenesis |
| | The results demonstrate a noxious effect of the pulsed electromagnetic radiation (PEMR) on human spermatogenesis. | | | These works and those on the role of biological material led us to study the possible effect of ELF on human male spermatogenesis. | | | We used testicular samples originated from a 35-year old patient who presented a left varicocele (grade 4). |
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http://www.emf-bioshield.com/emf/experimenttesticular.html
(1418 words)
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| | Spermplaty: a bibliography on sperm of Platyhelminthes |
| | Watson, N. A., and Chisholm, L. Spermatozoa and spermiogenesis in the monocotylid Heterocotyle capricornensis (Platyhelminthes, Monogenea, Monopisthocotylea), including observations of aberrant folding and fusing of spermatozoa in one individual. | | | Gong, R.-C., Li, B.-F., and Zhu, H.-Q. [The syncitial cluster forms in spermatogenesis in Fasciola sp.]. | | | Tang, J.-Y., and Li, M.-M. Ultrastructural studies on spermatogenesis of Dicrocoelium chinensis (Trematoda: Digenea). |
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http://www.mnhn.fr/mnhn/bpph/Data/Spermplaty
(6544 words)
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| | Spermatogenesis |
| | Spermatogenesis, sexual behaviour, erection and ejaculation and their endocrine control | | | Age related changes in erections, ejaculation and fertility | | | Both FSH and testosterone are needed for normal quantitative and qualitative spermatogenesis but their role is unclear. |
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http://www.bui.ac.uk/Tutorials/spermatogenesis.htm
(1893 words)
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| | [No title] |
| | Rate of production of spermatozoa is not influenced by endocrine therapy. | | | Spermatogenesis is the process of sperm cell development. | | | Hormonal effects on sperm cells are not direct, but are mediated through Sertoli cells. |
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http://www.uwyo.edu/wjm/repro/spermat.htm
(1769 words)
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| | Spermatogenesis |
| | This whole process of spermatogenesis takes approximately 74 days and about 300 | | | There are a number of causes of this (Box 6.36) but it is highly likely given his past medical history that the cytotoxic drug cyclophosphamide was the cause. | | | Whilst spermatogenesis is dependent on the hormonal drive from the gonadotrophins and testosterone, temperature also plays a critical factor in this process. |
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http://www.ncbi.nlm.nih.gov/books/bv.fcgi?db=Books&rid=endocrin.section.1185
(686 words)
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| | spermatogenesis |
| | A description of the abbreviations for this section may be helpful to check if you can not figure out what something is labeled. | | | Identify the Sertoli cells which regulate spermatogenesis and are often refered to as nurse cells. | | | Lastly identify the late elongating spermatid which have condensed nuclei condensed but most of the cytoplasm about to be removed in the residual body. |
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http://www.wisc.edu/ansci_repro/lab/lab8/spermatogenesis/spermatogenesis.html
(361 words)
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| | Spermatogenesis |
| | This part of spermatogenesis is defined as the nuclear and cytoplasmic changes in the spermatid that results in the spermatozoa | | | Spermatogenesis occurs in medullary sex cords known as seminiferous tubules. | | | Once the Sertoli function is developed, testosterone alone will maintain spermatogenesis |
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http://www.rci.rutgers.edu/~uzwiak/HumanSexuality/HSSpringLect3.html
(638 words)
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| | ESTRADIOL AND SPERMATOGENESIS - , estradiol anhydrous |
| | I can not help thinking of that last fourteenth of, determined to spare no time nor pains. | | | who she was, estradiol and spermatogenesis For a moment he was simply amused. | | | When he had gone about a, on the screen at the very same instant appears the elongated outline, estradiol and spermatogenesis and stayed leaning, convictions were but a matter of extravagant theory. |
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http://pharm0.homestead.com/estradiol-and-spermatogenesis
(212 words)
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| | Male Infertility Overview |
| | LH effects spermatogenesis indirectly in that it stimulates androgenous testosterone production. | | | Decreases in spermatogenesis are accompanied by decreased production of inhibin and this reduction in negative feedback is associated with reciprocal elevation of FSH levels. | | | The mechanism of feedback control of FSH is regulated by a Sertoli cell product called inhibin. |
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http://www.ivf.com/shaban.html
(3866 words)
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| | Efficiency of spermatogenesis. |
| | Efficiency of spermatogenesis is related to the amount of germ cell degeneration, pubertal development, season of the year, and aging of humans and animals. | | | Spermatogenesis and germ cell degeneration can be quantified from numbers of germ cells in various steps of development throughout spermatogenesis, and quantitative measures are related to number of spermatozoa in the ejaculate. | | | Spermatogenesis is a process of division and differentiation by which spermatozoa are produced in seminiferous tubules. |
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http://www.arclab.org/medlineupdates/abstract_8563040.html
(354 words)
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| | Spermatogenesis |
| | Understand the anatomical relationships of cells within the seminiferous tubules. | | | These various kinds of signals help to insure that development occurs in an orderly way. | | | TGF-ß receptors are expressed in the mammalian testis, suggesting that members of the TGF-ß family of signaling molecules play a role in spermatogenesis. |
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http://www.ucalgary.ca/UofC/eduweb/virtualembryo/spermatogenesis.html
(1518 words)
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| | Blue Histology - Male Reproductive System |
| | Spermatogenesis is regulated by follicle stimulating hormone (FSH), which in males stimulates the spermatogenic epithelium, and luteinizing-hormone (LH), which in males stimulates testosterone production by Leydig cells in the interstitial tissue. | | | Look at different tubules to see different stages of spermio- and spermatogenesis. | | | The terminal phase of spermatogenesis is called spermiogenesis and consists of the differentiation of the newly formed spermatids into |
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http://www.lab.anhb.uwa.edu.au/mb140/CorePages/MaleRepro/malerepro.htm
(2750 words)
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| | Research Summaries - Sharpe et al. |
| | chimpanzees) that have an organization of spermatogenesis similar to that of the human also have a reduced efficiency of spermatogenesis. | | | The organization of the stages of spermatogenesis in human males is different from that of species with highly efficient spermatogenesis. | | | The poor efficiency ('efficiency' referring to the number of germ cells that each Sertoli cell supports) of spermatogenesis in the human male may make him more susceptible than other species to the adverse effects of environmental factors. |
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http://www.emcom.ca/summaries/sharpe.shtml
(1263 words)
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| | SingaporeMoms - Parenting Encyclopedia - Spermatogenesis |
| | The Sertoli cell is essential for spermatogenesis as it provides support for the developing sperm cells - moving them towards the lumen of the semiferous tubule as they develop until maturity when they are released. | | | Spermatogenesis refers to the creation, or genesis, of sperm cells, which occurs in the male gonads or testes. | | | The process of spermatogenesis is highly regulated via hormonal messengers and also the cell-cell comunication between the developing germ cells (sperm cells) and the nurse-like Sertoli cells. |
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http://www.singaporemoms.com/parenting/Spermatogenesis
(357 words)
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| | spermatogenesis - OneLook Dictionary Search |
| | spermatogenesis : Technical and Popular Medical Terms [home, info] | | | spermatogenesis : The On-line Medical Dictionary [home, info] | | | spermatogenesis : Dorland's Illustrated Medical Dictionary [home, info] |
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http://www.onelook.com/?w=spermatogenesis
(165 words)
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| | ANS 431: Sperm & Spermatogenesis |
| | Last step is a breakage of the stalk between the residual cytoplasmic body and the cytoplasmic droplet that remains after release B. Hydrostatic pressure forces the sperm out of the seminiferous tubules into the rete testis 4. | | | Formation of A1 key to maintaining continuity of spermatogenesis 4. | | | New spermatozoa are being formed and released into the duct system constantly 2. |
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http://www.siu.edu/~tw3a/431spgns.htm
(742 words)
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| | Spermatogenesis Overview |
| | With this combination of approaches, we hope to define the cells that emit controlling signals, and identify the genes encoding those signals, or the responses to those signals. | | | The pages below illustrate some of the markers and reagents that can be used to study spermatogenesis. | | | In addition, we are indebted to very useful suggestions and expert advice, as well as critical reagents, that came from Steve Wasserman, Minx Fuller, Dennis McKearin, Brian Oliver and Alan Spradling and their colleagues. |
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http://www.med.upenn.edu/sdinardo/spintro.html
(548 words)
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| | EvolNews.org |
| | Previous phylogeographic studies of some Buthid scorpions based on mtDNA sequences hinted that mitochondrial recombination may be occurring in this group. | | | Interesting cytological evidence in this family involving the fusion of mitchondria during spermatogenesis provided a possible mechanism. |
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http://www.evolnews.org
(1471 words)
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| | Dr. Silber's Bibliography |
| | Silber, SJ: Recovery of spermatogenesis after testicle autotransplantation in an adult male. | | | Silber, S.J., Devroey, P., Camus, M. and Van Steirteghem, A.C. (1997) The effect of female age and ovarian reserve on pregnancy rate in male infertility: treatment of azoospermia with sperm retrieval and intracytoplasmic sperm injection. | | | Silber, SJ: Quantitative evaluation of spermatogenesis in men with congenital absence of the vas deferens by testicular histology. |
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http://www.infertile.com/closlook/bibliogr.htm
(5392 words)
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| | The toxicology of male reproduction |
| | ethanol, cannabis, gossypol, sperm, fecundity, fertility, sex, mating, male, reproduction, toxicology, toxins, toxin, toxic, sperm, spermatazoa, spermatazoon, Luteinising Hormone, Follicle Stimulating Hormone, spermatogenesis, testosterone, testes, testis, testicle, testicular, semen, reproductive biology, reproductive toxicology, insemination, inseminate, Sertoli cells, gonads, gonadal, gonadotrophin, lindane, Leydig cells, steroids, epididymus, scrotum, dibromochloropropane, tetrachlorodibenzodioxin, Agent Orange, diethylstilbestrol, organophophorus pesticides |
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http://brighton73.freeserve.co.uk/tomsplace/scientific/msc-review/msr-top.htm
(53 words)
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