Context:Air pollution is common in all countries and affects reproductive functions in men and women. It particularly impacts sperm parameters in men. This meta-analysis aimed to examine the impact of air pollution on the quality of sperm.Evidence Acquisition:The scientific databases of Medline, PubMed, Scopus, Google scholar, Cochrane Library, and Elsevier were searched to identify relevant articles published between 1978 to 2013. In the first step, 76 articles were selected. These studies were ecological correlation, cohort, retrospective, cross-sectional, and case control ones that were found through electronic and hand search of references about air pollution and male infertility. The outcome measurement was the change in sperm parameters. A total of 11 articles were ultimately included in a meta-analysis to examine the impact of air pollution on sperm parameters. The authors applied meta-analysis sheets from Cochrane library, then data extraction, including mean and standard deviation of sperm parameters were calculated and finally their confidence interval (CI) were compared to CI of standard parameters.Results:The CI for pooled means were as follows: 2.68 ± 0.32 for ejaculation volume (mL), 62.1 ± 15.88 for sperm concentration (million per milliliter), 39.4 ± 5.52 for sperm motility (%), 23.91 ± 13.43 for sperm morphology (%) and 49.53 ± 11.08 for sperm count.Conclusions:The results of this meta-analysis showed that air pollution reduces sperm motility, but has no impact on the other sperm parameters of spermogram.
Background: IVM (in vitro maturation) appear to be certified high pregnancy outcome. Therefore, attempt to find an appropriate culture system using natural products for increasing developmental competencies fascinating. Objectives: This experiment is aimed to evaluate the effect of sea cucumber methanol extract on in vitro maturation of immature mouse oocyte. Methods: In this experimental study, Preantral follicles at germinal vesicle stage were collected from 24-26 days NMRI female mouse ovaries and transferred to IVM medium supplemented with different concentration of sea cucumber methanol extract (5, 10, 20, 30 µg/mL). Antioxidant capacity of sea cucumber extract was evaluated using DPPH (2, 2-diphenyl-1-picrylhydrazyl) assay. Further, oocyte maturation and TNF-α expression were recorded till day 10 th. Data were analyzed by one-way analysis of variance (ANOVA) through SPSS 16. Results: The percentage of arrested oocyte at germinal vesicle stage in the control group was significantly (P < 0.05) higher than treated group (20 µg/mL). There were significant (P < 0.01) differences in percentage of maturated oocyte to metaphase II (MII) stage between treated and control group. DPPH radical scavenging capacity and reduction of TNF-α expression in treated oocyte demonstrated that sea cucumber increased rate of oocyte maturation. In addition, the treated oocyte (20 µg/mL) achieved the highest percentage of MII stage. Conclusions: It was concluded that the sea cucumber extract with optimum concentration can improve oocyte maturation. Sea cucumber extract treatment can be suggested as a novel therapeutic strategy to be used in infertility modality in the future.
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