Are microplastics in follicular fluid affecting IVF egg quality and success rates?

What's actually in it

Microplastics are particles smaller than 5mm broken off from larger plastic items. They're in tap water, bottled water, seafood, and many packaged foods. The body absorbs very small particles through the gut lining. From there, they can accumulate in unexpected places, including reproductive tissue.

Follicular fluid is the liquid that surrounds and nourishes developing eggs inside ovarian follicles. Any toxin that accumulates here is directly affecting egg development.

What the research says

A 2026 study measuring microplastics in follicular fluid from women undergoing IVF found detectable microplastic particles in follicular fluid samples. Women with higher microplastic concentrations in their follicular fluid had worse clinical outcomes: lower fertilization rates and fewer viable embryos.

The presence of microplastics in follicular fluid means they've traveled from the gut through the bloodstream into the ovary itself. The plastic particles likely cause oxidative stress and may carry other absorbed chemicals like pesticides and plasticizers that further affect egg quality.

Reducing plastic use in the kitchen, filtering drinking water, and eating less food from plastic packaging are the most practical ways to reduce microplastic body burden.