What are the differences between hyperemesis gravidarum and “morning sickness”?

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    Last Updated: April 23, 2025

    Hyperemesis gravidarum differs from morning sickness in that it involves significant weight loss, severe and constant nausea, and frequent vomiting, and it often requires medical intervention; morning sickness typically involves mild to moderate symptoms that improve with lifestyle changes and do not hinder daily activities. Additionally, hyperemesis gravidarum can lead to serious mental health struggles, whereas morning sickness generally allows for a return to normal functioning.

    Morning SicknessHyperemesis Gravidarum
    You lose little to no weight.You lose more than 5% of your prepregnancy weight.
    You are able to eat and drink a sufficient amount each day.You are unable to eat or drink adequate amounts during the day due to nausea and vomiting.
    You experience mild to moderate nausea periodically; vomiting occurs infrequently.You experience moderate to severe nausea constantly; vomiting occurs often and may contain bile or blood.
    Diet and lifestyle changes help you feel better most of the time.Symptoms are uncontrolled by diet and lifestyle and may require medications and IV hydration.
    Symptoms usually improve after the first trimester, with occasional nausea throughout pregnancy.Symptoms usually improve by mid-pregnancy, but sometimes may persist until late pregnancy.
    Most days you are able to continue working and caring for yourself and your family.You may be unable to work or care for yourself and your family for weeks or months.
    You may struggle with your mental health occasionally if nausea is severe, but overall you feel like your normal self most of the time.You may have major struggles with your mental health including depression and anxiety. The trauma of your experience may lead to post-traumatic stress.

    Table adapted from the HER Foundation

    What are the differences between hyperemesis gravidarum and “morning sickness”? - Examine