Flame retardants in breast milk are associated with slightly lower mental development scores in fourteen-month-old children, reports a new study from Spain. The chemicals were measured in the first milk called the colostrum. On average, children with higher exposures scored two points lower on the mental development scale than less-exposed children. The scale measures age-appropriate advances, including performance abilities, memory, and early language skills. The average mental development score is 100, and two-thirds of children score between 85 and 115 points.