Lifestyle influences human sperm functional quality
نویسندگان
چکیده
منابع مشابه
Lifestyle in the sperm
M ore than 200 years ago, JeanBaptiste Lamarck (1744–1829) proposed a theory for the major question in biology: How do organisms change over time to adapt to their environment and create new species? Lamarck reasoned that if an organism changes to better adapt to its environment, these changes would be passed on to its offspring, and this would explain changes over generations. He was eventuall...
متن کاملSperm competition influences sperm size in mammals.
Among mammals sperm competition leads to selection for increased sperm numbers but it is not known whether it also leads to changes in sperm size. Two contrasting theoretical predictions have been made. The first hypothesis relies on the assumption that there is a trade-off between sperm numbers and sperm size and predicts that, in species confronting sperm competition, there will be a concomit...
متن کاملSperm competition influences sperm size in mammals
Among mammals sperm competition leads to selection for increased sperm numbers but it is not known whether it also leads to changes in sperm size. Two contrasting theoretical predictions have been made. The first hypothesis relies on the assumption that there is a trade-off between sperm numbers and sperm size and predicts that, in species confronting sperm competition, there will be a concomit...
متن کاملOxidative DNA damage in human sperm influences time to pregnancy.
BACKGROUND Oxidative stress and related DNA damage in human sperm may be important for fecundity and pregnancy outcome. METHODS We studied the level of oxidative DNA damage in terms of 7-hydro-8-oxo-2'-deoxyguanosine (8-oxodG) in sperm DNA among 225 first-pregnancy planners. Over the six menstrual cycle follow-up time, after cessation of contraception, 135 pregnancies were conceived. RESULT...
متن کاملsperm ubiquitination correlation with human semen quality
background: ubiquitin, an 8.5 kda peptide that marks other proteins for proteasomal degradation, tags defective sperm during epididymal passage. thus, sperm ubiquitination is a universal marker for sperm defects and can be used as a sperm function test. the objective of the present study was to examine the relationships between sperm ubiquitination and clinical semen parameters, using simpl...
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ژورنال
عنوان ژورنال: Asian Pacific Journal of Reproduction
سال: 2012
ISSN: 2305-0500
DOI: 10.1016/s2305-0500(13)60081-0