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Updated: Aug 14, 2026

Long-term Behavioral and Reproductive Consequences of Embryonic Exposure to Low-dose Toxicants
Published on: March 6, 2018
[Brominated flame retardants may cause brain injuries in the fetus and the newborn]
Yngvar Gundersen1, Per Vaagenes, Trine Reistad
1Forsvarets forskningsinstitutt, Avdeling for beskyttelse, 2027 Kjeller. yngvar.gundersen@ffi.no
Background:
Brominated flame retardants are incorporated into an ever-increasing number of ordinary consumer goods, which has lead to pollution of the environment, wildlife, food of animal origin, and human blood, adipose tissue, and mother's milk. This group of chemicals has a striking structural similarity with the thyroid hormones and may constitute a potential health risk by interfering with thyroid hormone homeostasis.
Material And Methods:
We focus on these features and discuss possible clinical consequences, on the basis of Medline searches and our own experience.
Results:
The thyroid hormones are essential for normal brain development. Disruption of the hormonal balance may lead to serious and permanent defects of neurological functioning. Brominated flame retardants may interfere with thyroid synthesis, transport, receptor binding, and elimination. The clinical consequences have so far not been firmly established, but results from animal studies suggest that even subtle disturbances of thyroid homeostasis during pregnancy may have serious implications for the developing brain.
Interpretation:
Numerous scientific reports confirm the neurotoxic potential of these chemicals. The foetus and newborn are especially vulnerable.
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