You’ve probably been wondering when this one would show up on the list, and it’s the exact reason we almost forgot to add it. Just because we had the baby doesn’t mean we’ve left mombie mode. Pregnancy brain can hang around for a while after, but why are we forgetting our keys in the refrigerator in the first place?
Researchers did lots of scanning and brain-picking and ultimately found that our brains shrink during pregnancy. That doesn’t mean we become pea-brains, but the cells do get smaller and fail to function as well as normal. The next time someone tells you mom brain is all in your head, you can confirm it literally is.