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The risk of short-term microplastic exposure on female reproductive function: A rat model study
Summary
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.