منابع مشابه
Response: Sperm Density Declines
Last year Swan et al. (1) published a reanalysis of data from 61 studies originally compiled and analyzed by Carlsen et al. (2). Just prior to the appearance of the Swan et al. artide, we published a reanalysis in another journal (3). Regional differences were considered in both reanalyses, but we examined only the effect ofyear in the final models (fertility status was also considered in the i...
متن کاملResponse: A Reanalysis of Sperm Density Data
Male fertility potential in terms of semen quality: a review of the past, a study of the present. Data from men in greater Seattle area reveals no downward trend in semen quality: further evidence that deterioration of semen quality is not geographically uniform. Longitudinal study of semen quality in Wisconsin men over one decade. Wis Med J 91:477479 (1992). 15. Lipshultz Ll. 'The debate conti...
متن کاملComparison of Sperm Telomere Length between Two Sperm Selection Procedures: Density Gradient Centrifugation and Zeta Potential
Background: Telomeres are particular sequences of DNA located at the end of the eukaryotic chromosomes that are essential for genome integrity. Telomere length in spermatozoa differs among males, as well as spermatozoa. Also, decreased telomere length in spermatozoa of infertile men is associated with the reduction of fertility potential and embryo quality. Density gradient centrifugation (DGC)...
متن کاملBull Fertility and Its Relation with Density Gradient Selected Sperm
Background sperm selection is generally used to describe methods for separation of spermatozoa for in-vitro-assisted reproduction. Few studies reported relation in vivo fertility and semen parameters after selection of fertile spermatozoa; hence, our research attempt to assess different semen parameters after post-thaw (PT) or after selecting sperm sample (SSp), using density gradient separatio...
متن کاملDetermination of some seminal plasma indices, sperm density and sperm motility in the Persian sturgeon Acipenser persicus
Some biological aspects of semen were investigated in the Persian sturgeon, Acipenser persicus, by determination of seminal plasma indices (ionic composition and osmolality), sperm density and their relationships with sperm motility. The osmolality of seminal plasma ranged from 42.00 to 111.00 mOsmol Kg-1. The concentrations of Sodium (Na+), Potassium (K+), Chloride (Cl-), Calcium (Ca2+) and Ma...
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ژورنال
عنوان ژورنال: Environmental Health Perspectives
سال: 1998
ISSN: 0091-6765
DOI: 10.2307/3434213