Nausea and vomiting are common complaints during pregnancy, especially during the first part of pregnancy. This is often called "morning sickness," although it can occur at any time of the day.

Most cases of nausea and vomiting are not harmful. When nausea and vomiting are severe and persist, though, they can affect your health.

What Causes Nausea?
Although no one is certain what causes the nausea and vomiting, rising levels of hormones during pregnancy may play a role.

In most women, symptoms of nausea and vomiting are mild and go away after the middle of pregnancy. But some cases of nausea and vomiting are severe. This condition is called hyperemesis gravidarum. It can lead to loss of weight and body fluids.

Effects on Pregnancy
Most mild cases of nausea and vomiting do not harm you or your baby's health. Morning sickness does not mean your baby is sick.

What You Can Do
Until the nausea and vomiting go away, there are some things you can do that might help you feel better:

• Get up slowly in the morning and sit on the side of the bed for a few minutes.
• Eat dry toast or crackers before you get out of bed in the morning.
• Get plenty of fresh air. Take a short walk or try sleeping with a window open.
• Drink fluids often during the day. Herbal teas and cold drinks that are bubbly or sweet may help.
• Eat five or six small meals each day. Try not to let your stomach get empty, and sit upright after meals.
• Avoid smells that bother you.
• Eat foods that are low fat and easy to digest.

Prenatal vitamins and iron may cause nausea. A children's chewable vitamin with folate (folic acid) taken at the end of the day may help.

Medical Treatment
If your nausea and vomiting are severe, you may need medical treatment .

Finally ...
During pregnancy your body goes through many changes. Nausea and vomiting are common complaints of pregnant women. While your body adjusts to the many changes during the first part of your pregnancy, you may find some relief if you follow the tips given here. Call your doctor right away if your nausea and vomiting become severe.

This excerpt from ACOG's Patient Education Pamphlet is provided for your information. It is not medical advice and should not be relied upon as a substitute for visiting your doctor. If you need medical care, have any questions, or wish to receive the full text of this Patient Education Pamphlet, please contact your obstetrician-gynecologist.