When it comes to pregnancy, most women know the basics: take your prenatal vitamins, avoid raw fish, and stay hydrated. But a new study suggests that what you eat, particularly in the third trimester, could have a lasting impact on your baby’s temperament and emotional well-being.
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The Surprising Link Between Maternal Diet & Infant Mental Health
According to research published in Scientific Reports, consuming high-glycemic foods (those that rapidly raise blood sugar levels) during late pregnancy is linked to increased negative emotions in infants, including sadness and fear. The study, led by Dr. Elizabeth Wood of the OHSU School of Medicine, suggests that targeted dietary changes during pregnancy could positively influence a child’s early emotional development.
What Did the Study Find?
Researchers analyzed the diets of pregnant women in their second and third trimesters, tracking their glycemic index (GI), insulin resistance, and body fat levels. The emotional responses of their babies were then assessed at six months old using caregiver reports and behavioral observations. Key Findings:
- A higher dietary glycemic index in the third trimester was linked to increased infant sadness at six months.
- Increased insulin resistance in the second trimester was associated with higher levels of infant fear.
- Maternal body fat in late pregnancy did not appear to impact infant temperament—dietary quality played the biggest role.
What Does This Mean for Expecting Mothers?
While pregnancy cravings are real (hello, ice cream, and fries!), this study suggests that choosing lower GI alternatives could support better emotional health in newborns. Instead of reaching for processed carbs and sugary treats, expectant mothers may want to swap in nutrient-dense, whole foods that provide steady blood sugar levels.
Smart Swaps for a Healthier Pregnancy Diet
Skip: White bread, pastries, sugary cereals, soda
Swap for: Whole grains, nuts, seeds, legumes, fresh fruit
Skip: Processed snacks (chips, crackers, cookies)
Swap for: Greek yogurt, hummus with veggies, or avocado toast
While more research is needed, these findings suggest that small dietary changes in the third trimester could lead to big emotional benefits for your baby.
