Want your baby's IQ to be a few points higher? Then keep it away from chemicals in household items like shower curtains, nail polish, and dryer sheets during pregnancy, a new study says. Researchers at Columbia University came to this conclusion after analyzing 328 women and their kids in New York City, CTV News reports. The research team measured how much the moms were exposed to chemicals called phthalates during the third trimester of pregnancy, and then, seven years later, gave their children IQ tests. Kids in the top 25% of chemical exposure scored 6.6 to 7.6 points lower. "The magnitude of these IQ differences is troubling," a senior study author tells Science Daily. "A six- or seven-point decline in IQ may have substantial consequences for academic achievement and occupational potential."
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