Babies’ and children’s mattresses and bedding emit toxic chemicals and flame retardants associated with developmental and hormonal disorders, according to two new studies.

“We measured chemicals in the air of 25 children’s bedrooms between the ages of 6 months and 4 years and found worrisome levels of more than two dozen phthalates, flame retardants and UV filters,” said senior study author Miriam Diamond, a professor in the Earth Sciences Department at the University of Toronto.

The highest levels of the chemicals were found near the children’s beds, according to the study published Tuesday in the journal Environmental Science & Technology.