They also discovered the worse the morning sickness, the more likely the children were to get higher scores on a variety of tests.
Researchers say the hormones that cause nausea and vomiting are actually beneficial and create better conditions for the baby.
Women who have morning sickness were also less likely to have a miscarriage and less likely to have babies with cardiovascular problems.
The findings are reported in the online Journal of Pediatrics.
MORE L.A. BREAKING NEWS, WEATHER, TRAFFIC, SPORTS
USEFUL LINKS:
SEND TIP || REPORT TYPO || TWEET @abc7 || WIDGET