Chemical exposure during pregnancy studied

Chemical substances commonly found in everyday products such as cosmetics, food packaging, and plastics may affect the cognitive development of young children, according to studies published on October 20, 2026, in the journal Environmental Health Perspectives. The research focused on the third trimester of pregnancy, a critical period for fetal development, and highlighted the challenge of protecting children from chemicals that are widespread in the environment.

Research team and chemical families examined

The studies were conducted by a research team from Inserm, the Grenoble-Alpes University, CNRS, the Grenoble CHU, and the University of Grenada in Spain. The scientists investigated two major families of chemical compounds: phthalates, used in certain plastics, and phenols, which include bisphenols and parabens among others. Some of these compounds are proven or suspected endocrine disruptors, substances that may interfere with the hormonal system, which plays an essential role in fetal development.

Chemical presence in the general population

The substances were detected in nearly the entire population, making it particularly difficult to avoid them completely. To better understand their possible effects on the developing brain, the researchers followed 380 pregnant women and their children.

Study design and findings

The study tracked the children from birth through early childhood, assessing their cognitive development and exposure levels. Researchers found that higher exposure to phthalates and phenols was associated with delays in language and motor skills, suggesting a potential link between these chemicals and developmental outcomes. The findings emphasize the need for further research and possible regulatory action to reduce exposure during pregnancy.