Mom brain is a real thing Women that have given birth can all agree that ‘Mom Brain’ is not a myth. Well, scientists agree with that, too! Many women reported that they couldn’t think straight or as clearly as they used to before the pregnancy. They often felt foggy and had problems with remembering things. While many think that the decrease in cognitive function is caused by lack of sleep, scientists believe that it’s a bit more complicated than that. It turns out that female brain restructures itself during and after pregnancy as does the rest of the body with all its hormones. This means that some brain functions can be ‘sacrificed’ as less important for a woman that’s given birth in favor of others that need to be used more.