Have microplastics been found in ovarian follicular fluid?

A 2025 study confirmed the presence of microplastic particles in human ovarian follicular fluid, the liquid surrounding eggs as they develop within the ovaries. This discovery is significant because follicular fluid provides the microenvironment in which oocytes mature, and any contamination of this fluid can directly affect egg quality and viability. The most commonly detected polymers were those found in everyday textiles and packaging.

The presence of microplastics in follicular fluid has been associated with elevated follicle-stimulating hormone (FSH) levels, a clinical marker of diminished ovarian reserve. Higher FSH suggests the ovaries are working harder to stimulate follicle development, which typically indicates a reduced pool of healthy eggs. For women trying to conceive, this finding links microplastic exposure to one of the most common causes of age-related fertility decline, potentially accelerating it.

While research into the full reproductive implications is ongoing, the precautionary approach is to minimize microplastic exposure through controllable sources. Clothing and bedding are among the largest contributors to daily microplastic contact, particularly during sleep when you spend 6 to 9 hours pressed against fabric. ONDU offers natural-fiber sleepwear and bedding from brands like Mate the Label that keep microplastics away from your body during these extended contact hours.