🧠 A Second Pregnancy May Leave a Different Mark on the Brain
Pregnancy changes the brain—but a second pregnancy may change it in a different pattern than the first.
A 2026 study from Amsterdam UMC followed 110 women using detailed MRI scans before and after pregnancy. Researchers found that second pregnancies produced distinct changes in brain structure and organization.
The biggest clue? Changes during a second pregnancy were more pronounced in the dorsal attention and somatomotor networks—brain systems involved in responding to the outside world, attention, movement and task demands.
Meanwhile, changes linked to the default mode network, which is involved in internally focused and social-cognitive processes, were more prominent during a first pregnancy and appeared to be further fine-tuned during a second.
Scientists suggest these differences may reflect the brain adapting to the changing demands of motherhood—but the study does not prove that the brain becomes better at multitasking or that senses such as vision and hearing become sharper.
One thing is clear: pregnancy can leave a measurable neurological signature—and each pregnancy may shape the brain in its own way.
Source:
Straathof, M., Halmans, S., Pouwels, P. J. W., Crone, E. A., & Hoekzema, E. (2026). The effects of a second pregnancy on women’s brain structure and function. Nature Communications, 17, 1495.
ALT 🧠 **A Second Pregnancy May Leave a Different Mark on the Brain
Pregnancy changes the brain—but a second pregnancy may change it in a **different pattern** than the first.
A 2026 study from Amsterdam UMC followed 110 women using detailed MRI scans before and after pregnancy. Researchers found that second pregnancies produced distinct changes in brain structure and organization.
The biggest clue? Changes during a second pregnancy were more pronounced in the **dorsal attention and somatomotor networks**—brain systems involved in responding to the outside world, attention, movement and task demands.
Meanwhile, changes linked to the **default mode network**, which is involved in internally focused and social-cognitive processes, were more prominent during a first pregnancy and appeared to be further fine-tuned during a second.