How does pregnancy physically change a woman's brain?

Pregnancy causes physical alterations in the brain's structure and activity, particularly in networks related to self-reflection and attention.

What brain changes occur during a first pregnancy?

During a first pregnancy, the default mode network, responsible for self-reflection, undergoes significant structural and activity changes.

Are brain changes during pregnancy linked to mental health?

Yes, these brain changes have been linked to a woman's risk of pregnancy-related depression, including postpartum depression.

Home / Health / Pregnancy Rewires Your Brain: New Study Reveals Changes

Pregnancy Rewires Your Brain: New Study Reveals Changes

23 Feb

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Summary

Pregnancy causes physical alterations in a woman's brain.
First pregnancy alters self-reflection and mind-wandering networks.
Second pregnancy shows further changes, impacting attention.
Brain changes are linked to maternal bonding and depression risk.

New research published on February 19, 2026, reveals that pregnancy causes significant physical changes in a woman's brain. Scans showed distinct alterations during both a first and second pregnancy, suggesting an adaptation of skills needed for motherhood. A first pregnancy most notably impacts the default mode network, associated with self-reflection and mind-wandering. This network is further refined in subsequent pregnancies, which also bring changes to brain areas involved in attention and sensory responses. These shifts may be beneficial for caring for multiple children. The study also found connections between these brain changes, maternal-child bonding, and the risk of pregnancy-related depression.

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