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Invisible Barriers to Male Reproductive Health: Microplastic Toxicity, Fertility, and Psychosexual Implications
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This review pulls together existing animal and human research showing that tiny plastic particles (microplastics) we're exposed to every day may harm male fertility, damaging sperm quality, lowering testosterone and other key hormones, and stressing the tissue that protects developing sperm cells. While much of this evidence comes from animal studies, the pattern is concerning enough that scientists are calling for stronger regulations and more research on how plastic pollution could be quietly affecting men's reproductive and sexual health.
Objective: This review critically examines the impact of microplastics (MPs) and nanoplastics (NPs) on the male reproductive system, with particular emphasis on the cellular, molecular, hormonal, and psychosexual consequences of environmental plastic exposure. The study further explores how these pervasive pollutants contribute to reproductive dysfunction and infertility in contemporary society. Methods: The review adopts a comprehensive qualitative analysis of existing literature derived from both human and animal-based studies, including rodent and quail models. The study evaluates the routes of exposure to MPs and NPs, their accumulation within physiological tissues, and the biochemical mechanisms associated with reproductive toxicity, endocrine disruption, and impaired male fertility. Results: Current evidence indicates that MPs contribute significantly to seminiferous tubule degeneration, reduced testicular weight, impaired spermatogenesis, decreased sperm motility and viability, and increased sperm DNA fragmentation. At the molecular level, MPs induce oxidative stress through excessive reactive oxygen species generation, activate pro-inflammatory nuclear factor kappa-light-chain-enhancer of activated B cells signaling pathways, and disrupt the blood-testis barrier via imbalance of mammalian target of rapamycin complexes. Furthermore, MPs exhibit endocrine-disrupting effects by lowering serum testosterone, luteinizing hormone, and follicle-stimulating hormone levels, thereby adversely affecting reproductive and psychosexual health. Conclusion: MPs exposure represents an emerging environmental threat to male reproductive vitality and psychosexual well-being. The findings highlight the urgent need for improved environmental regulation, advanced detection and mitigation strategies, and interdisciplinary research frameworks to address the growing reproductive, hormonal, and psychosocial consequences of plastic pollution.
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Microplastics and male reproductive toxicity: Research progress on injury pathways and regulatory mechanisms
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This review pulls together existing research showing that tiny plastic particles from our environment can build up in male reproductive organs, where they've been linked to lower sperm quality in humans. Studies in animals and cells suggest these plastics may sneak past the body's natural defenses in the testicles, causing cell damage, inflammation, and hormone disruption that harms sperm production. While more research is needed to confirm exactly how much risk this poses to human fertility, the findings add to growing concerns about everyday plastic exposure and reproductive health.
Microplastic Exposure and Male Infertility: Mechanisms, Effects on Semen Quality and Emerging Human Evidence
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This review summarizes research on tiny plastic particles found in human semen and testicular tissue. In rodent studies, exposure was linked to cell damage, hormone disruption, and reduced sperm count and quality; human studies show similar associations but are too limited to prove the particles cause male infertility.
The Impact of Microplastics on Male Fertility
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Microplastics and nanoplastics accumulate in testicular tissue and disrupt spermatogenesis through oxidative stress, inflammation, endocrine disruption, and structural damage to reproductive cells, consistently impairing sperm quality in experimental models. With global plastic production accelerating alongside documented declines in semen quality, this review highlights microplastic exposure as a plausible environmental contributor to male infertility warranting urgent human study.
Microplastics and impaired male reproductive health—exploring biological pathways of harm: a narrative review
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This narrative review summarizes the evidence that microplastics may harm male reproductive health through oxidative stress, hormone disruption, inflammation, and direct damage to reproductive cells. While animal studies show concerning effects on sperm quality, testicular function, and fertility, human studies are still lacking. The review calls for urgent research on microplastic impacts on human male fertility and for policies to reduce microplastic exposure.
Micro- and nanoplastic exposure: male reproductive toxicity, underlying mechanisms, and research prospects
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This review summarizes existing research on how tiny plastic particles, which can enter the body through food, air, or skin, may harm male fertility. It describes proposed biological mechanisms, including cell damage, hormone disruption, and gut bacteria changes, linked to reduced sperm quality in studied models.
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