Results 271 to 280 of about 216,508 (311)
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Sperm Retrieval and Quality Evaluation
2014Technical refinements in sperm retrieval methods and the application of advanced reproductive technologies (ART) using surgically retrieved sperm have enabled biological paternity in azoospermic men who were considered untreatable 20 years ago.
Peter J, Stahl +2 more
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Polybrominated diphenyl ethers and sperm quality
Reproductive Toxicology, 2011Polybrominated diphenyl ethers are known to be endocrine disruptors and may affect male reproduction. This exploratory study investigated semen parameters and serum thyroid hormones in relation to serum PBDE, PCBs and p-p' DDE in adult men.Fifty-two men were recruited in a fertility clinic. Semen counts were done for each participant.
N, Abdelouahab, Y, Ainmelk, L, Takser
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Assessment of the Sperm Quality Analyzer
Fertility and Sterility, 1995To assess the relationship between the results of the Sperm Quality Analyzer (United Medical Systems Inc., Santa Ana, CA), which measures motile sperm concentration by light scattering, conventional manual semen analysis characteristics, and computer-assisted sperm motility analyses.Sperm Quality Analyzer measurements and manual and computer-assisted ...
R C, Johnston +3 more
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TEST-yolk media and sperm quality
Human Reproduction Update, 1995Media prepared with egg yolk and two buffers, TES and Tris, called TEST-yolk have been shown to have beneficial effects on the survivability, fertilizing capacity and storage potential of human spermatozoa. Egg yolk lipoproteins are the critical compounds for the beneficial effects, with a synergistic effect due to the TES-Tris buffer component.
R S, Jeyendran +3 more
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Mammalian sperm quality and aromatase expression
Microscopy Research and Technique, 2009AbstractIn most mammalian species the aromatase is encoded by a single gene (cyp19), which contains 18 exons, 9 of them being translated. In adult rats, together with Leydig cells germ cells represent an additional source of estrogens. The amount of P450arom transcript is threefold higher in pachytene spermatocytes compared to younger cells ...
Carreau, Serge +2 more
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General and Comparative Endocrinology, 2010
Fish egg quality can be defined as the ability of the egg to be fertilized and subsequently develop into a normal embryo. Similarly, sperm quality can be defined as its ability to successfully fertilize an egg and subsequently allow the development of a normal embryo.
Bobe, Julien, Labbé, Catherine
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Fish egg quality can be defined as the ability of the egg to be fertilized and subsequently develop into a normal embryo. Similarly, sperm quality can be defined as its ability to successfully fertilize an egg and subsequently allow the development of a normal embryo.
Bobe, Julien, Labbé, Catherine
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Dithiothreitol Effects on Human Sperm Quality
Journal of Urology, 1994Human semen normally coagulates immediately after ejaculation and then undergoes liquefaction during the next 15 to 60 minutes. Incomplete seminal liquefaction can result in impaired sperm motility and make clinical evaluation and manipulation difficult.
M J, Barmatz +2 more
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Sperm nuclear protamines: A checkpoint to control sperm chromatin quality
Anatomia, Histologia, Embryologia, 2018AbstractProtamines are nuclear proteins which are specifically expressed in haploid male germ cells. Their replacement of histones and binding to DNA is followed by chromatin hypercondensation that protects DNA from negative influences by environmental factors. Mammalian sperm contain two types of protamines: PRM1 and PRM2.
Klaus Steger, Rod Balhorn
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Association between obesity and sperm quality
Andrologia, 2017There is awareness of likelihood of abnormal spermatozoa in obese men; however, results from previous studies are inconclusive. Advances in computer-aided sperm analysis (CASA) enable precise evaluation of sperm quality and include assessment of several parameters. We studied a retrospective cohort of 1285 men with CASA data from our infertility clinic
G. A. Ramaraju +6 more
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Sperm quality during extra‐gonadal sperm reserve depletion in stallions
Reproduction in Domestic Animals, 2018ContentsTo estimate when, during stallions’ extra‐gonadal reserves (EGR) depletion period, sperm quality would reach its highest quality, six light breed sexually rested stallions were collected daily for 7 days to deplete EGR. On collection days 1, 3, 5, and 7, sperm output, total (TM) and progressive (PM) motility, morphology, and plasma membrane ...
Jose A. Len +3 more
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