Results 251 to 260 of about 47,453 (299)
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Worldwide variations in sperm counts
Urology, 1996Based on the premise that various human disease processes manifest differently depending on geography, we set out to determine whether sperm counts vary from different nations and different regions within the United States.We reviewed the literature of all significant population-based studies that evaluated sperm counts from fertile or presumably ...
H, Fisch, E F, Ikeguchi, E T, Goluboff
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Effect of Overdose Zinc on Mouse Testis and Its Relation with Sperm Count and Motility [PDF]
Biological Trace Element Research, 2003 The purpose of this study was to investigate the effects of excessive zinc intake on the testes and on sperm count and motility in mice. Thirty Balb c mice were divided randomly into 3 groups of 10 animals in each. Group I acted as controls; group II was
Gulcin Abban, Gunfer Turgut
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Reexamination of “normal” sperm count
Urology, 1974A males ejaculated semen can vary up to 40% in volume sperm count and sperm motivility 100 vasectomized men were studied before vasectomy for sperm counts of single specimens; 15% of these men (all fathers of 2 or more children) had sperm counts considered by accepted standards to be infertile (below 60 million).
F C, Derrick, J, Johnson
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Current Protocols in Toxicology, 2002
AbstractMaking Epididymal Sperm Counts (Yefan Wang, TherImmune Research Corporation, Gaithersberg, Maryland). Epididymal sperm counts are a widely used, simple and sensitive method of assessing the effects of male reproductive toxicants on the epididymal and/or testicular site of action.
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AbstractMaking Epididymal Sperm Counts (Yefan Wang, TherImmune Research Corporation, Gaithersberg, Maryland). Epididymal sperm counts are a widely used, simple and sensitive method of assessing the effects of male reproductive toxicants on the epididymal and/or testicular site of action.
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Journal of the American Medical Association, 1948
To the Editor:— I should like to call your attention to Dr. I. C. Rubin's article published inThe Journal(Dec. 28, 1946, page 1047) "Contraception Masking Sterility and Infertility." While most practitioners interested in the field of fertility in men would agree with Dr. Pollack and Dr. E. T.
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To the Editor:— I should like to call your attention to Dr. I. C. Rubin's article published inThe Journal(Dec. 28, 1946, page 1047) "Contraception Masking Sterility and Infertility." While most practitioners interested in the field of fertility in men would agree with Dr. Pollack and Dr. E. T.
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Evaluation of Sperm Counts and Total Sperm Counts in 2543 Men Requesting Vasectomy
Andrologia, 2009Semen analyses were performed on semen specimens from 2543 men requesting vasectomy at Planned Parenthood of Houston and the results were compared to earlier reports of semen analyses in allegedly fertile men. The comparisons suggest that mean sperm counts and mean total sperm counts are significantly lower than those reported in 1951.
K D, Smith +3 more
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FISH on sperm: spot-counting to stop counting? Not yet
Fertility and Sterility, 2009To evaluate the reliability and applicability of the spot-counting system (Cytovision Spot AX workstation) which offers an alternative to the tedious manual analysis of sperm fluorescence in situ hybridization (FISH).Manual and automatic analyses were performed and compared.Universitat Autònoma de Barcelona.Twenty-four men who asked for information on ...
Molina, Òscar +3 more
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Estrogens and falling sperm counts
Reproduction, Fertility and Development, 2001Extravagant claims have been made repeatedly in recent years that human sperm counts are falling and that global exposure to environmental estrogens are responsible. The basis for these two distinct claims is reviewed. The claims of falling human sperm output, reviving an old debate, are prompted by a paper by Carlsen et al . (1992). This meta-analysis,
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Sperm count and sperm motility decrease in old rats
Physiology & Behavior, 2013Sexual behavior declines with age in male rats. The rate and magnitude of this decline may depend on the amount of prior sexual experience and a number of other, unidentified factors. Age-dependent changes in the characteristics of ejaculate quality in rats have not been described earlier, and the relationship between such changes and modifications of ...
Rosa Angélica, Lucio +3 more
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2017
Selection of the best ejaculate from the donor species depends greatly on precise calculation of the concentration of the live sperm cells. Different laboratories engaged in the semen biology work employ variety of instruments and procedures. These, coupled with the variability of the result induced by the objective assessment (inter-technician ...
P. Perumal +3 more
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Selection of the best ejaculate from the donor species depends greatly on precise calculation of the concentration of the live sperm cells. Different laboratories engaged in the semen biology work employ variety of instruments and procedures. These, coupled with the variability of the result induced by the objective assessment (inter-technician ...
P. Perumal +3 more
openaire +1 more source