Summary: Many new mothers will find that their memory seems to be worse than before pregnancy and childbirth. Is this really the legendary \”one pregnancy and three years of stupidity\”? Core tip: Pregnancy sickness refers to the phenomenon of memory loss and cognitive decline in expectant mothers after pregnancy. Commonly known as \”a fool\’s embarrassment lasts three years\”. There is a similar saying in foreign countries: \”It\’s stupid to be pregnant for three years\”, which is called babybrain. Many new mothers will find that their memory seems to be worse than before pregnancy and childbirth. They are always forgetful, forgetful, and even suffer from dizziness, insomnia,