Hyperemesis Gravidarum
What is Hyperemesis Gravidarum?
Hyperemesis gravidarum is severe and persistent nausea and vomiting during pregnancy. It goes far beyond typical morning sickness. Women with this condition may vomit multiple times each day and struggle to keep down food or fluids. This can lead to dehydration, weight loss, and nutritional deficiencies.
About 0.3 to 3 percent of pregnant women experience hyperemesis gravidarum. It usually begins in the first trimester and can last throughout pregnancy. The condition is serious and often requires medical treatment. Without proper care, it can affect both mother and baby.
Unlike regular morning sickness that improves after the first few months, hyperemesis gravidarum can be debilitating. Many women need hospitalization for IV fluids and nutrition. Early detection and monitoring through blood and urine tests help guide treatment decisions.
Symptoms
- Severe nausea that does not go away
- Vomiting more than three to four times per day
- Weight loss of 5 percent or more of pre-pregnancy body weight
- Dehydration and decreased urination
- Dizziness or fainting when standing
- Rapid heart rate
- Low blood pressure
- Headaches and confusion
- Extreme fatigue and weakness
- Unable to keep down food or liquids for 24 hours or more
Some women experience milder symptoms at first that worsen over time. The severity can vary from day to day. If you cannot keep fluids down for more than 12 hours, seek medical attention right away.
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Causes and risk factors
The exact cause of hyperemesis gravidarum is not fully understood. Researchers believe hormone changes play a major role. Human chorionic gonadotropin, or HCG, rises rapidly in early pregnancy. Higher HCG levels may trigger more severe nausea. Estrogen levels also increase during pregnancy and may contribute to symptoms.
Risk factors include carrying twins or multiples, history of hyperemesis in a previous pregnancy, and being pregnant for the first time. Women with a history of motion sickness or migraines may face higher risk. Being overweight before pregnancy, having a female fetus, and thyroid disorders can also increase your chances. Stress and certain nutritional deficiencies may worsen symptoms, though they do not directly cause the condition.
How it's diagnosed
Doctors diagnose hyperemesis gravidarum based on symptoms and lab tests. Your provider will ask about the frequency of vomiting and check for signs of dehydration. A physical exam includes checking blood pressure, heart rate, and weight loss. Blood tests measure electrolyte levels like chloride to assess the severity of dehydration and acid-base imbalances. Urine tests check for ketones, which appear when your body breaks down fat for energy due to starvation.
Rite Aid offers testing for chloride and urine ketones through our preventive health panel at Quest Diagnostics locations. These tests help monitor the severity of hyperemesis gravidarum and guide treatment decisions. Persistent ketones in urine indicate you need more calories and fluids. Your doctor may order additional tests to rule out other conditions causing severe vomiting.
Treatment options
- IV fluids to restore hydration and correct electrolyte imbalances
- Small, frequent meals with bland foods like crackers, toast, and rice
- Ginger supplements or ginger tea to reduce nausea
- Vitamin B6 supplements, often combined with the antihistamine doxylamine
- Anti-nausea medications such as ondansetron, promethazine, or metoclopramide
- Thiamine supplementation to prevent deficiency from prolonged vomiting
- Rest and stress reduction techniques
- Avoiding strong smells and food triggers
- Eating cold foods that may be easier to tolerate
- Total parenteral nutrition through IV for severe cases that do not respond to other treatments
Concerned about Hyperemesis Gravidarum? Get tested at Rite Aid.
- Simple blood draw at your nearest lab
- Results in days, not weeks
- Share results with your doctor
Frequently asked questions
Morning sickness usually involves mild to moderate nausea and occasional vomiting in the first trimester. Hyperemesis gravidarum is much more severe, with constant nausea and vomiting multiple times daily. It causes weight loss, dehydration, and often requires hospitalization. Morning sickness does not typically prevent you from eating or drinking.
Most women develop symptoms between weeks 4 and 6 of pregnancy. Symptoms usually peak around weeks 9 to 13. For many women, symptoms improve after week 20, but about 20 percent continue experiencing symptoms throughout pregnancy. Each pregnancy can be different even in the same woman.
With proper treatment, most babies are born healthy despite maternal hyperemesis gravidarum. Severe untreated cases can lead to low birth weight or premature delivery. Early detection and management reduce these risks. The key is getting medical care quickly to maintain hydration and nutrition.
Ketones appear in urine when your body burns fat for energy instead of carbohydrates. This happens when you cannot keep down enough food. Persistent ketones indicate you need more calories and fluids. Your doctor uses ketone levels to decide if you need IV nutrition or hospitalization.
Vomiting causes loss of stomach acid, which contains high amounts of chloride. This leads to low chloride levels in your blood. The condition also creates a metabolic alkalosis, an imbalance in blood pH. Chloride testing helps your doctor know how much electrolyte replacement you need.
If you had hyperemesis in one pregnancy, you have a 15 to 80 percent chance of having it again. The severity may differ between pregnancies. Some women experience milder symptoms in subsequent pregnancies. Planning ahead with your healthcare provider can help you prepare and get early treatment.
Cold, bland foods often work best. Try crackers, toast, pretzels, rice, bananas, and applesauce. Small amounts of protein like chicken or nuts may help stabilize blood sugar. Avoid greasy, spicy, or strongly flavored foods. Eating small amounts every one to two hours prevents an empty stomach.
You should seek immediate care if you cannot keep fluids down for 12 hours or more. Signs you need hospitalization include feeling dizzy when standing, very dark urine, or confusion. Many women need IV fluids and anti-nausea medication in the hospital. Some require multiple hospitalizations throughout pregnancy.
Stress does not cause hyperemesis gravidarum, but it can worsen symptoms. The condition itself is very stressful, creating a difficult cycle. Rest, support from family, and stress reduction techniques may help you cope. Some women benefit from counseling or support groups with others who understand the condition.
There is no proven way to prevent hyperemesis gravidarum completely. Starting prenatal vitamins before conception may help reduce severity. Eating small, frequent meals early in pregnancy might prevent worsening symptoms. If you had hyperemesis before, talk to your doctor about early intervention strategies. Early treatment when symptoms start can prevent severe dehydration.