Table 1.

Main studies exploring health effects of low-dose prenatal mercury exposure

STUDY LOCATIONDETAILSASSOCIATIONS WITH PRENATAL MERCURY EXPOSURE
Faroe Islands18,19More than 900 mother-child pairs; diet included PCB exposure (whale meat), but analyses controlled for PCBsMemory, language, and attention deficits at age 7; fine motor, attention, visual-spatial, and verbal skill deficits at age 14
New Zealand20237 mother-infant pairs; varying fish consumption patterns during pregnancy (low to high)Reduced performance in scholastic and psychological tests during early school years
Seychelles Islands21,22779 mother-infant pairs; approximately 12 fish meals a week on average during pregnancyPilot study showed lower Denver Developmental Screening Test scores; main study showed no delays in developmental milestones or deficits in neurodevelopmental tests
  • PCB—polychlorinated biphenyl.