Treating depression during pregnancy may benefit baby’s brain development – new research

Depression impacts around one in five women during pregnancy. A recent study, co-authored by researchers and published in Nature Communications, suggests that treating pregnant women's depression through a brief course of talk therapy can positively impact their baby's brain development before birth. The study is part of an ongoing project examining the effects of a specific form of brief interpersonal psychotherapy called MOMCare on pregnant women with depression and their babies.

MOMCare is an eight-session program focused on building interpersonal skills, reducing conflict, and strengthening social support. Researchers enrolled 234 pregnant women with depression symptoms in the study, randomly assigning them to either receive MOMCare or education about mental health, strategies for managing depression, and referrals to community mental health support services.

The MOMCare group showed significant improvement, with 36% of moms diagnosed with depression before receiving treatment and just 6% after. The MOMCare intervention also increased the likelihood of carrying the baby to term, leading to shorter hospital stays after birth and improved child health and development. Using MRI, researchers found that the hippocampus, a brain area crucial for learning, memory, and emotional regulation, was 5% smaller in volume in infants whose mothers received MOMCare compared to those who didn't.

Six months later, babies with a smaller hippocampal volume at birth tended to respond less negatively to unfamiliar experiences, suggesting stronger emotional regulation. While smaller brain volume is often associated with negative effects in adults, in infancy, faster growth may not always be disadvantageous. This study is the first to demonstrate that treating a woman's depression during pregnancy can influence infant brain development, supporting the idea that treating prenatal depression is crucial for both mother and child's health.