科研之友
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摘要
spermogram or semen analysis is one of the most used parameters in the evaluation of male fertility.who (2010) presented the 5th manual for review and processing of human semen, a document that was discussed during the first workshop of standardization of semen analysis (pleas), held in santiago de chile, may 2010. subsequently appliedthenew values expressed in %26quot;lower referencelimit%26quot; (lrl) for semen in several analysisstudiesconductedbyvariousauthors (2003 to 2010). the results indicate that 81% of latin american researchers believe the new manual standardizes best sperm concentration, 96% agree with the new subclassification in progressive sperm motility (a), non-progressive (b) andimmobile (c). 68% determined that the best instruments for the sperm countis the neubauer haemocytometerchamber. regarding quality control only 18% performed external quality control. 100% ofresearchersbelieveit isappropriate to conductongoing standardization workshops. regarding the application of lrl in the study populations (2003-2010), 100% comply with the standards to be considered a population with fertility capacity. however, several authors argue that a new version of the who manual, must be re-done urgently to better standardize sperm concentration (15 million/ml) and morphology according to strict criteria (4%), reference values considered very low.
