Results 151 to 160 of about 22,975 (207)
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Urologic Clinics of North America, 2020
From a fertility perspective, men with azoospermia represent a challenging patient population. When no mature spermatozoa are obtained during a testicular sperm extraction, patients are often left with limited options, such as adoption or the use of donor sperm. However, it has been reported that round spermatids can be successfully injected into human
Kelli X, Gross +2 more
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From a fertility perspective, men with azoospermia represent a challenging patient population. When no mature spermatozoa are obtained during a testicular sperm extraction, patients are often left with limited options, such as adoption or the use of donor sperm. However, it has been reported that round spermatids can be successfully injected into human
Kelli X, Gross +2 more
openaire +2 more sources
Clinical efficacy of spermatid conception: analysis using a new spermatid classification scheme. [PDF]
Human Reproduction, 1999 Fertilization and pregnancy outcomes of 50 round spermatid injection (ROSI) and 20 elongated spermatid injection (ELSI) treatment cycles are related to various characteristics of the cycles, with particular reference to spermatid developmental stage as assessed by using a classification scheme adapted to this purpose.
Mariana S. Sousa +2 more
exaly +3 more sources
Motile Components in Spermatids as Related to Transport of Spermatids and Spermatozoa*
Andrologia, 2009Two distinctly different components of motility were detected in living early spermatids of the rat using phase contrast microscopy and video-analysis: the primary flagellum (a 9 + 2 axonema) executes wave-like motion in three dimensions. At the same time the flagellum displays alternatively in clockwise and counter-clockwise directions partial torsion,
H, Walt, C, Hedinger
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Reproduction, Fertility and Development, 1995
Intracytoplasmic sperm injection (ICSI) is becoming increasingly popular in human infertility clinics as an efficient method for the treatment of male infertility. It is proposed that spermatids can be used as substitutes for spermatozoa if men are unable to produce sperm in their testes.
A, Ogura, R, Yanagimachi
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Intracytoplasmic sperm injection (ICSI) is becoming increasingly popular in human infertility clinics as an efficient method for the treatment of male infertility. It is proposed that spermatids can be used as substitutes for spermatozoa if men are unable to produce sperm in their testes.
A, Ogura, R, Yanagimachi
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Fertility and Sterility, 2000
This finding has caused great concern with round spermatid enthusiasts. A major complaint is that “one should not restrict the label of round spermatid only to those cells in which an acrosomal vesicle is visible” (p. 2977) (4). However, our observation is based not only on phase-contrast evaluation of TESE microdroplets but also on detailed stained ...
Silber, Sherman +3 more
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This finding has caused great concern with round spermatid enthusiasts. A major complaint is that “one should not restrict the label of round spermatid only to those cells in which an acrosomal vesicle is visible” (p. 2977) (4). However, our observation is based not only on phase-contrast evaluation of TESE microdroplets but also on detailed stained ...
Silber, Sherman +3 more
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THE DEVELOPMENT OF THE RAT SPERMATID
Journal of the Royal Microscopical Society, 1951SYNOPSIS.The stages of development of the rat spermatid as seen with the phase‐contrast microscope are described and illustrated. The process as thus discerned is generally consistent with previous accounts, but differs in certain particulars.The short dark rods in the Golgi apparatus of the early spermatids form a U‐shaped structure at later stages ...
C R, AUSTIN, C S, SAPSFORD
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Spermatogenesis in anthozoa: Differentiation of the spermatid
Cell And Tissue Research, 1975The fine structure of spermatids has been examined in Calliactis, Protanthea, Gonactinia and Parazoanthus (Cnidaria, Anthozoa). The sperm cells are relatively simple and lack distinct acrosomes. Their nuclei, spherical in the zoanthid, in the actinians are slendertipped cones. Condensation of the chromatin is interpreted in terms of progressive coiling
E B, Lyke, E A, Robson
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Myosin in early spermatids of the rat
Virchows Archiv B Cell Pathology Including Molecular Pathology, 1981In order to obtain insight into the basic mechanism of cytoplasmic undulation in early spermatids, tubuli seminiferi of young adult rats were fixed in Stieve’s solution and examined immunohistochemically with anti-fast skeletal muscle myosin serum. A number of nuclei of spermatogonia, spermatocytes and spermatids stained intensely, but in addition the ...
H, Walt +3 more
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