Morphometric analysis of human sperm morphology
نویسندگان
چکیده
منابع مشابه
Ultrastructural Morphology of Sperm from Human Globozoospermia
Globozoospermia is a rare disorder characterized by the presence of sperm with round head, lacking acrosome. Coiling tail around the nucleus has been reported since early human studies, but no specific significance has conferred it. By contrast, studies on animal models suggest that coiling tail around the nucleus could represent a crucial step of defective spermatogenesis, resulting in round-h...
متن کاملCurrent status and potential of morphometric sperm analysis
The spermatozoon is the most diverse cell type known and this diversity is considered to reflect differences in sperm function. How the diversity in sperm morphology arose during speciation and what role the different specializations play in sperm function, however, remain incompletely characterized. This work reviews the hypotheses proposed to explain sperm morphological evolution, with a focu...
متن کاملLooking forward to human sperm morphology.
In this issue ofHumanReproduction, Augeret al. (2016) examine sperm abnormalities in fertile and infertile men, and those with testicular cancer, extendingwhatwas published in themost recent version of theWHOLaboratory Manual for the Examination and Processing of Human Semen (WorldHealthOrganization, 2010) onnormal sperm forms.That publicationattempted for thefirst timetoraise thequalityof seme...
متن کاملAnother look at human sperm morphology.
STUDY QUESTION Can a standardized assessment of abnormal human sperm morphology provide additional useful information by identifying men with more severe disturbances in different types of abnormalities? SUMMARY ANSWER Definition-based categorization of sperm head, midpiece and tail defects has shown how differently these abnormalities are distributed in fertile men and other groups of men, t...
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South American camelids are classified in four different species included in two genera. Llama (Lama glama L.) and alpaca (Vicunya pacos, L.) are the domestic species, presenting a high economical interest. This classification is based on historical, evolutionary and morphological criteria, but the level of hybridization and the total reproductive compatibility make it difficult to use the “bio...
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ژورنال
عنوان ژورنال: International Journal of Andrology
سال: 1994
ISSN: 0105-6263,1365-2605
DOI: 10.1111/j.1365-2605.1994.tb01250.x