منابع مشابه
Sexual Abstinence and Sperm Quality
The scientific literature estimates that male infertility accounts for 30% to 40% of infertility among couples (13). Before fertility treatments can be initiated, it remains unclear on what should be the optimal period of sexual self-restraint required to warrant maximum quality sperm is achieved. According to the World Health Organization (WHO), the abstinence time before medical examination s...
متن کاملDuration of sexual abstinence: epididymal and accessory sex gland secretions and their relationship to sperm motility.
BACKGROUND The data on the association between the abstinence period and sperm motility are conflicting. METHODS Ejaculates from 422 men assessed for infertility were analysed according to the World Health Organization (WHO) guidelines. Seminal plasma neutral alpha-glucosidase (NAG), prostate-specific antigen (PSA), zinc and fructose were measured. Three groups were defined according to the l...
متن کاملSexual selection and the evolution of sperm quality.
Sperm experience intense and varied selection that dramatically impacts the evolution of sperm quality. Selection acts to ensure that sperm are fertilization-competent and able to overcome the many challenges experienced on their way towards eggs. However, simply being able to fertilize an egg is not enough to ensure male fertility in most species. Owing to the prevalence of female multiple mat...
متن کاملRelationship between the duration of sexual abstinence and semen quality: analysis of 9,489 semen samples.
OBJECTIVE To evaluate the relationship between duration of sexual abstinence and various characteristics of normal and subnormal semen. DESIGN A retrospective study based on computerized data. SETTING Fertility and IVF unit at a university medical center. PATIENT(S) Nine thousand, four hundred eighty-nine semen samples from 6,008 patients were analyzed according to the World Health Organi...
متن کاملInfluence of the abstinence period on human sperm quality: analysis of 2,458 semen samples
OBJECTIVE The aim of this study was to evaluate the influence of different periods of abstinence on conventional semen parameters as well as functional parameters in human semen, including mitochondrial function, chromatin packing and sperm DNA fragmentation. METHODS We recruited a cohort of 2,458 men undergoing infertility investigation. Semen analyses were performed according to WHO guideli...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: International Journal of Women's Health and Reproduction Sciences
سال: 2017
ISSN: 2330-4456
DOI: 10.15296/ijwhr.2017.03