Nanoplastic Exposure During Pregnancy Hurts Sons' Fertility

When pregnant mice were exposed to nanoplastics, their male offspring grew up with damaged testicles and impaired fertility. The plastic exposure happened before birth, but the damage showed up in adulthood.

Prenatal Exposure, Lifelong Consequences

Researchers exposed pregnant mice to polystyrene nanoplastics and then studied the reproductive health of adult male offspring. The results were grim, according to a 2026 study in Environ Int.

The adult males had testicular injury, reduced androgen (male hormone) production, and impaired sperm production. The nanoplastics triggered a chain of molecular events: increased oxidative stress, elevated inflammatory compounds like arachidonic acid and palmitic acid, and cellular damage that killed testicular cells.

The Damage Starts Before Birth

These nanoplastics crossed the placenta during pregnancy. The offspring never directly consumed or inhaled them. Yet the reproductive damage persisted into adulthood. Researchers mapped out the entire biological pathway from molecular disruption to organ damage to reproductive dysfunction.

Nanoplastics are everywhere: in food packaging, water bottles, dust, and air. Pregnant women are getting exposed constantly.

What You Can Do

Avoid plastic food containers during pregnancy. Don't heat food in plastic. Drink from glass or stainless steel. Reduce synthetic dust in your home. And explore non-toxic baby products to build a cleaner environment for your growing family.

Also see glass food storage for safer alternatives.

Source: Zhang R, Wang H, Zhao M, et al. (2026). Environ Int.