Abstract. Research conducted in recent years provides more and more evidence that diet can have a significant impact on male fertility. The aim of the study was to analyze the relationship between diet, energy balance and fertility in men. A comprehensive literature search of published studies in various languages, was carried out in electronic databases. The direct analysis included 96 works published between 2008 and 2018, including 12 randomized controlled trials and 23 systematic reviews and meta-analyses. A strong adherence to a healthy dietary pattern is positively correlated with total sperm count, progressive motility and total motile sperm count (all p < 0.05). However, attention is drawn to the fact that foods that are considered “healthy” can sometimes contain a significant amount of pollution, which negatively affect the semen parameters. An adequate intake of antioxidants or their supplementation have been quite effective in the prevention and treatment of male infertility. The improvement of pregnancy rate after antioxidant therapy ranged in various studies from 11% to 41%. An important problem, however, may be choosing the right dose of the supplement or finding an appropriate combination of antioxidants that may be more effective than any single antioxidant. The normalization of men's body weight is beneficial for the quality of sperm and the concentration of male reproductive hormones. Further, long-term studies require the assessment of the impact of drastic weight loss after bariatric surgery on male fertility.
New frequency of sterility certainly one of partners away from reproductive age brackets, according to some supplies, out-of 8% so you’re able to twenty five% [1–3]. Male sterility ‘s the merely factor in sterility when you look at the 20–30% regarding cases and the one thing contributing to infertility during the fifty% of all of the infertility instances . The fresh new investigations out-of male fertility always includes scientific test and you will research with the resource opinions of one’s adopting the semen parameters: frequency, overall sperm fertility, concentration, motility and morphology (Desk 1) . Reduced sperm fertility and you can/or quality is present in ninety% regarding lovers with fertility issues . About evaluation of fertility, the concentrations off male reproductive hormonal also are reviewed. More recently, the fresh new molecular composition out of sperm structure, reviewed by the contrasting the amount of DNA fragmentation otherwise oxidative be concerned could have been increasingly taken into account. Several degree make use of the DNA fragmentation index (DFI) as an indicator of being pregnant success. Predicated on Evenson and Wixon, DFI selections away from three to five% from inside the match men, when you find yourself a DFI out of ? 30% are regarding the quicker virility . Already laid out hereditary activities, and one another chromosomal aberrations and you may monogenic changes, account fully for just about 10–15% from instances of male infertility . The source to possess virility issues may also be environmental situations. The aim of the study was to become familiar with the connection anywhere between diet, times harmony and virility pricing in the males.
Means regarding books research
A comprehensive literature search of published studies in various languages, was carried out in electronic databases, including: PubMed, Cochrane Central Register of Controlled Trials (CENTRAL), Cochrane Database of Systematic Review and Google Scholar. Randomized controlled trials, observational and qualitative studies published between 2008 and 2018 (up to and including March) were included. The following keywords related to male infertility, diet, nutrients and their combinations (made by applying operators AND and https://datingranking.net/escort-directory/anaheim/ OR) were used in the search: ‘male infertility’, ‘sperm quality’, ‘idiopathic oligozoospermia’, ‘astenoazospermia’, ‘oligoastenoteratozoospermia’, ‘sperm DNA damage’, ‘nutritional status’, ‘BMI’, ‘obesity’, ‘diet’, ‘nutrition’, dietary pattern’, ‘food’, ‘nutrient’, ‘fatty acids’, ‘antioxidant’, ‘supplementation’, ‘vitamin C’, ‘vitamin E’,’ vitamin A’, ‘folate’, ‘zinc’, ‘selenium’, ‘L-carnitine’, ‘glutathione’, ‘coenzyme Q10‘, ‘N-acetylcysteine’, ‘lycopene’. Reference lists of studies extracted from the primary electronic search were used to identify additional relevant studies.
|Sperm parameter||Source restrict (95% rely on durations)|
|Sperm volume||step one.5 ml (step one.4–step one.7)|
|Complete sperm count||39 million for every single ejaculate (33–46)|
|Sperm amount||fifteen million each ml (12–16)|
|Powers||58% real time (55–63)|
|Progressive motility||32% (31–34)|
|Full (progressive + nonprogressive) motility||40% (38–42)|
|Morphologically normal forms||cuatro.0% (3.0–cuatro.0)|