Could hormone residues be involved?
Division of Biological Sciences, University of Missouri, 105 Lefevre Hall, Columbia, MO 65211, USA.Human Reproduction (Impact Factor: 4.57). 06/2007; 22(6):1503-5. DOI: 10.1093/humrep/dem092
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- "Sperm concentration was inversely related to the mother's beef intake per week. In sons of ''high beef consumers'' (>7 beef meals/week), sperm concentration was 24.3% lower than in the men whose mothers ate less beef (Swan et al., 2007;vom Saal, 2007). The intake of 15 soy-based foods in the previous 3 months was assessed for 99 male partners of subfertile couples (Chavarro et al., 2008). "
ABSTRACT: Diet is a complex exposure variable, which calls for multiple approaches to examine the relationship between diet and disease risk. To address these issues, several authors have recently proposed studying overall dietary patterns by considering how foods and nutrients are consumed in combinations. The aim of the study was to investigate the associations between dietary patterns, semen quality parameters, and the level of reproductive hormones. The study population consisted of 336 men who attended the infertility clinic for diagnostic purposes and who had normal semen concentration of 20 to 300 mln/ml or slight oligozoospermia (semen concentration of 15-20 mln/ml). Participants were interviewed, and a semen sample was provided by them. Diet was assessed via food frequency questionnaire, and dietary patterns were identified by factor analysis. Men were classified into three groups according to scores of each dietary pattern: Western, Mixed, or Prudent. A positive association was observed between sperm concentration and Prudent dietary pattern, and level of testosterone and Prudent dietary pattern (p = .05, p = .03, respectively). Additionally, Prudent dietary pattern was identified to decrease the DNA fragmentation index (p = .05). The results were adjusted for sexual abstinence, age, smoking, past diseases, and alcohol consumption. Higher consumption of a Prudent dietary pattern was associated with higher sperm concentration and higher level of testosterone. Sperm chromatin structure was inversely related to higher consumption of a Prudent dietary pattern. Further research is needed to confirm these findings and extend these results to other populations.
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ABSTRACT: The production and widespread use of synthetic chemicals since the 1940s have resulted in ubiquitous contamination of fish, wildlife and human populations. Since the 1960s, observers have documented major damage to wildlife reproduction across the globe, and subsequently, damage to reproductive health in exposed humans as well. The sex ratio in human communities and populations can be readily measured to ascertain whether reproductive effects, such as subtle birth defects of the reproductive tract caused by exposures to chemicals, might be occurring. Male to female sex ratios appear to be declining in populations in several parts of the globe, possibly as a result of prenatal exposures to chemicals. Sex ratio data for communities with unusual occupational or environmental exposures can be compiled using traditional epidemiological techniques in pursuit of environmental justice. Local, regional and national population health researchers and occupational hygienists can use health statistics to examine sex ratios as sentinel health events that might portend patterns of subtle structural birth defects of the reproductive tract and functional deficits in neurodevelopment.
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ABSTRACT: To compare dietary habits in normospermic and oligoasthenoteratospermic patients attending a reproductive assisted clinic. An observational, analytical case-control study. Private fertility clinics. Thirty men with poor semen quality (cases) and 31 normospermic control couples attending our fertility clinics. We recorded dietary habits and food consumption using a food frequency questionnaire adapted to meet specific study objectives. Analysis of semen parameters, hormone levels, Y microdeletions, and karyotypes were also carried out. Frequency of intake food items were registered in a scale with nine categories ranging from no consumption to repeated daily consumption. Controls had a higher intake of skimmed milk, shellfish, tomatoes, and lettuce, and cases consumed more yogurt, meat products, and potatoes. In the logistic regression model cases had lower intake of lettuce and tomatoes, fruits (apricots and peaches), and significantly higher intake of dairy and meat processed products. Frequent intake of lipophilic foods like meat products or milk may negatively affect semen quality in humans, whereas some fruits or vegetables may maintain or improve semen quality.