Do Microplastics Affect Fertility?

⚕️ MEDICAL DISCLAIMER: This article is for informational and educational purposes only and is not intended as medical advice, diagnosis, or treatment. Always consult with a qualified healthcare provider before making any changes to your health regimen, diet, or supplement use, especially if you have existing medical conditions or take medications. The information presented here should not be used to diagnose, treat, cure, or prevent any disease.

Microplastics are now turning up in blood, lungs, and even reproductive tissues. A growing body of evidence shows harmful links between microplastics and fertility. Studies show reduced sperm quality and compromised oocyte maturation, suggesting that microplastics are associated with reproductive disruption. This article breaks down the mechanisms, evidence, and emerging risks associated with microplastic-induced fertility damage.

How Microplastics Impact Male Fertility

Microplastics have been detected in both human semen and testes, raising alarms about their direct effects on sperm quality and testicular health [6–12]. Multiple studies report declines in total sperm count, concentration, and motility in association with elevated microplastics exposure [3, 5, 7, 13]. One study focusing on polytetrafluoroethylene (PTFE, or Teflon) found that exposure was significantly associated with reduced progressive motility and total sperm output, and that each additional microplastic type in the body correlated with a further drop in semen quality [7].

Within the testes, microplastics can accumulate and trigger local inflammation and oxidative stress, impairing spermatogenesis and testosterone production [5, 7]. Rodent studies show testicular inflammation and disruption of the blood-testis barrier following polystyrene microplastic exposure. Additionally, these studies show reduced testosterone and impaired Sertoli cell function—key regulators of sperm maturation [7, 14–16]. 

Hormonal balance is also at risk. In both humans and animal models, microplastics have been shown to reduce levels of luteinizing hormone, follicle-stimulating hormone, testosterone, and estradiol. All of these are key hormones involved with male fertility [1, 13]. Mechanistically, this appears to come from oxidative stress-mediated activation of signaling pathways like JNK and NF-κB, which also contribute to inflammatory cytokine release and increased sperm deformities [7, 14]. In short, microplastics are causing immune reactions and damage within our reproductive organs. 

How Microplastics Impact Female Fertility

Evidence is also accumulating for female reproductive toxicity. Microplastics have been found in human ovarian follicular fluid, and their presence in reproductive organs is linked to reduced oocyte quality and impaired ovarian development [2, 17–18]. Experimental studies reveal decreased follicle counts, smaller follicle diameters, and elevated atresia rates following microplastic exposure in female mice [5].

At the cellular level, microplastics increase ovarian inflammation and oxidative stress, leading to compromised follicle maturation and cytoskeletal disruption [5, 14, 21]. Polystyrene particles have been shown to infiltrate granulosa cells and induce pyroptosis, a form of programmed inflammatory cell death, further degrading oocyte viability [5].

Hormonal pathways are another major target. Chemicals associated with microplastics, such as phthalates like DEHP, interfere with aromatase expression and estradiol production, impairing oocyte maturation and hormonal cycling [19]. 

Additionally, polymethylmethacrylate (PMMA) nanoplastics have been shown to enter the cytoplasm of embryos, elevate reactive oxygen species (ROS) levels, reduce blastocyst development, and lower implantation success in vitro [8]. 

Microplastics Effect The Placenta

In recent years, microplastics have been detected in human placental tissue, raising concerns about reproductive and fetal health [1, 2, 4, 10–11, 20]. Their presence is correlated with altered gestational timing, reduced birth weight, and inflammation in the maternal-fetal interface [4]. Lifestyle factors such as diet, environmental exposure, and product use appear to influence placental microplastics load, suggesting modifiable risk factors may exist [4].

Systemic Mechanisms of Reproductive Toxicity

Oxidative stress is a unifying mechanism of reproductive harm. In both sexes, microplastics increase cellular ROS production, damaging reproductive tissues and disrupting mitochondrial and nuclear function [3, 5]. This stress response not only affects gamete quality, but has also been linked to broader reproductive disorders such as endometriosis and idiopathic infertility [3, 5].

The endocrine-disrupting potential of microplastics spans hormonal production, transport, and receptor binding. These disruptions may contribute to miscarriage risk, menstrual irregularities, and congenital abnormalities when exposure occurs during critical developmental windows [1].

Microplastics also appear to affect reproductive immunology. Their accumulation may alter immune surveillance within reproductive organs, skew cytokine profiles, and interfere with implantation and placental development [5]. In males, emerging evidence also suggests possible impacts on sperm DNA integrity, further raising concerns for reproductive success [2]. 

How To Avoid Microplastics

Microplastics appear to affect markers of fertility in both males and females. Consequently, for health-oriented individuals, it’s critical to develop a lifestyle strategy to avoid microplastics. 

While it’s extremely difficult, if not impossible, to avoid microplastics, there are many small, simple actions that you can take each day to lower the amount of microplastics you consume. This is why we developed the Deplasto platform. 

Our platform, consisting of a wellness supplement, an app for tracking and measuring daily microplastic intake, and lifestyle recommendations is intended to help you avoid microplastics. Our scientifically-backed supplement is formulated to support your body’s natural detoxification defenses, including oxidative stress management, cellular repair, and antioxidant support. Our microplastic intake app is designed to show you an estimate of your daily exposure, with every datapoint backed by scientific studies, to help you understand how you can best avoid microplastics. Lastly, given that it’s nearly impossible to completely avoid microplastic exposure, we have a plethora of lifestyle recommendations designed to help you make small changes for big impacts. 

Overall, we believe that the best way to eliminate microplastics begins with you and the changes you make to your daily life. Over time, collectively, we can make a significant difference in your health and the environment.

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6. Association between blood microplastic levels and severity of extracranial artery stenosis
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9. Effects of the adsorption behavior of polyamide microplastics on male reproductive health by reduction of testosterone bioavailability
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