Nausea and vomiting during early pregnancy


  • Up to 80% of pregnant women have nausea and vomiting to some extent. Nausea and vomiting are most common and most severe during the 1st trimester. Although commonly called morning sickness, such symptoms may occur at any time during the day. Symptoms vary from mild to severe.
    Hyperemesis gravidarum is a severe, persistent form of pregnancy-related vomiting. Women with hyperemesis gravidarum vomit so much that they lose weight and become dehydrated. Such women may not consume enough food to provide their body with energy. Then the body breaks down fats, resulting in a buildup of waste products (ketones) called ketosis. Ketosis can cause fatigue, bad breath, dizziness, and other symptoms. Women with hyperemesis gravidarum often become so dehydrated that the balance of electrolytes, needed to keep the body functioning normally, is upset.
    If women vomit occasionally but gain weight and are not dehydrated, they do not have hyperemesis gravidarum. Morning sickness and hyperemesis gravidarum tend to resolve during the 2nd trimester.


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