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The risk of short-term microplastic exposure on female reproductive function: A rat model study
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Researchers investigated the effects of short-term microplastic exposure on female reproductive function in rats and found that even brief exposure disrupted hormone levels and altered ovarian and uterine tissue. Higher concentrations of microplastics led to thinning of the uterine lining and changes in steroid hormone receptor expression. The study suggests that even intermittent microplastic exposure may pose risks to reproductive health.
Long-term effects of microplastics (MPs) exposure have been demonstrated to impair reproductive function. However, in real world, the exposure level of MP is not constant and it may vary in different individuals. This study aims to evaluate the impact of short-term exposure to MPs on ovarian and endometrial function in rat models. Serum steroid hormone concentrations and the expression of ovarian steroid hormone receptor were disturbed. We found that as MPs exposure concentration increased, thickness of the endometrial glandular epithelial layer and the number of endometrial glands decreased; the number of primordial follicles decreased, while the numbers of primary and secondary oocytes significantly increased, indicating a potential oocyte overactivation. Although short-term MP exposure appears to not influence embryo implantation and hormone functions, the results of this study highlight the potential of MPs to disrupt reproductive health in women.
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Effect of Subchronic Oral Exposure to Polystyrene Microplastics on Female Rats
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In a month-long study, female rats that swallowed tiny plastic particles (microplastics) showed disrupted reproductive hormones and increased cell-damaging stress in their ovaries—and smaller particles (1 micrometer) caused more disruption than slightly larger ones. This matters because it suggests the plastic bits we're increasingly exposed to through food, water, and packaging could potentially affect fertility and hormone balance, though more research is needed to confirm whether these effects translate to humans.
Microplastic-induced female reproductive toxicity: Mechanisms and potential protective interventions.
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This review paper summarizes existing research on how microplastics may harm the female reproductive system, including the ovary, uterus, placenta, and pregnancy. It covers proposed mechanisms such as oxidative stress, hormone disruption, inflammation, and cell death, and discusses interventions that have been studied alongside microplastic exposure.
Impact of microplastics on female reproductive health: insights from animal and human experimental studies: a systematic review
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This systematic review of 15 experimental studies found that microplastic exposure significantly impairs ovarian function, decreases fertility rates, and disrupts hormone levels in female subjects. Several studies also reported negative effects on embryo development and offspring health, though study quality varied and more rigorous research is needed to confirm mechanisms.
Exposure to microplastics leads to a defective ovarian function and change in cytoskeleton protein expression in rat
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Researchers exposed female rats to polystyrene microplastics over multiple reproductive cycles and found, for the first time, that the particles accumulated in different parts of the ovarian tissue. The microplastics reduced ovarian weight, disrupted the normal development of egg follicles, altered the reproductive cycle, and lowered estrogen levels. The study suggests these effects are driven by oxidative stress and changes in key structural proteins within the ovary.
A review of the impact of micro‐ and nanoplastics on female reproduction: What we know and gaps in knowledge
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This review examines what is known about how micro- and nanoplastics affect female reproductive health. Animal studies show these particles accumulate in ovarian tissue, disrupt hormones, and cause oxidative stress, leading to hormonal imbalances and ovarian damage, though research in humans is still limited.
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When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.