Have you ever heard that you can't refuse pregnant women, because what? Because mice will start or mice will bite at night. What is the rational grain of these sayings? From the point of view of modern approaches, none. However, folk philosophy has its own foundation.
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Such a saying exists at the level of superstition. If a person believes in something, it happens.
Are the mice to blame for the rejection of the pregnant woman?
The image of rodents only symbolizes the troubles that will befall a person who dares to deny a woman a special status. A girl carrying a new life is too emotionally vulnerable, so it is important that she is not upset by others.
Negative emotions provoke stress, which adversely affects the health of the future child.
Refusing a pregnant woman means deliberately increasing the harm. For owners, material damage is what spoils the harvest, in particular mice.