Morning sickness and pregnancy


  • Morning sickness is when you have nausea and vomiting during pregnancy. Even though it’s called morning sickness, it can happen any time of day. 

  • Morning sickness usually starts at about 6 weeks of pregnancy and goes away in the second trimester. 

  • Morning sickness is common and it usually doesn’t cause harm to you or your baby. 

  • Hyperemesis gravidarum is severe nausea and vomiting that needs treatment (sometimes in a hospital) to help you get better. 

  • If your morning sickness is severe or if it goes into your fourth month of pregnancy, tell your health care provider right away. 

What is morning sickness?

Morning sickness (also called nausea and vomiting of pregnancy, or NVP) is nausea and vomiting that happens in the first few months of pregnancy. Even though it's called morning sickness, it can last all day and happen any time of day.

At least 7 in 10 pregnant women (70 percent) have morning sickness in the first trimester (first 3 months or the first 12 weeks) of pregnancy. It usually starts at about 6 weeks of pregnancy and is at its worst at about 9 weeks. Most women feel better in their second trimester, but some have morning sickness throughout pregnancy. If you have morning sickness, tell your health care provider.

Mild morning sickness doesn’t harm you or your baby. But if nausea and vomiting becomes severe (called hyperemesis gravidarum), it can cause serious problems during pregnancy, and you may need to stay in the hospital for treatment.

What is hyperemesis gravidarum?

Hyperemesis gravidarum is extreme, excessive nausea and vomiting during pregnancy that can cause weight loss and dehydration. If you have hyperemesis gravidarum, you need treatment to help keep you and your baby safe.

You may be at risk for hyperemesis gravidarum if you:

  • Are pregnant for the first time
  • Are pregnant with a girl
  • Are pregnant with multiples (twins, triplets or more). Being pregnant with more than one baby may increase your risk for severe morning because you may have a large placenta and increased pregnancy hormones, like estrogen or human chorionic gonadotropin (also called HCG).
  • Had mild or severe morning sickness in a previous pregnancy, or your mother or sister had severe morning sickness during pregnancy.
  • Have motion sickness or migraines.
  • Are overweight
  • Have trophoblastic disease, a condition that leads to abnormal cell growth in the uterus
  • Signs and symptoms of hyperemesis gravidarum include:
  • Vomiting more than three to four times a day
  • Vomiting that makes you dizzy, lightheaded
  • Vomiting that makes you dehydrated. Signs and symptoms of dehydration include feeling thirsty, having a dry mouth, having a fast heart beat or making little to no urine.
  • Losing more than 10 pounds in pregnancy

If you have hyperemesis gravidarum, your provider may treat you with medicine to help relieve your nausea and vomiting. You may need treatment in a hospital with intravenous (also called IV) fluids, which help you stay hydrated and can give you nutrients that you usually get from food. If you continue to lose weight, you may need a feeding tube to make sure you’re getting enough nutrients for you and your baby.

What causes morning sickness?  

We don’t know for sure what causes morning sickness. It may be caused by low blood sugar or increased pregnancy hormones, like HCG. Morning sickness may be worse if you’re stressed or overly tired, if you eat certain foods or if you’re traveling (if you often have motion sickness).

Can you prevent or relieve morning sickness?

Yes. Here’s what you can do to help you feel better and even prevent morning sickness:

  • Take a prenatal vitamin before you get pregnant. Talk to your provider about which one to take. Sometimes vitamins can upset your stomach, so take it with a snack.
  • Keep snacks by your bed. Eat a few crackers before you get up in the morning to help settle your stomach.  
  • Eat five or six small meals each day instead of three larger meals.  
  • Eat foods that are low in fat and easy to digest, like cereal, rice and bananas. Don’t eat spicy or fatty foods.
  • Eat healthy snacks between meals. This can help keep your stomach from being empty and helps prevent nausea. Try snacks that are high in protein, like milk or yogurt.
  • Drink plenty of fluids, especially water.  
  • Avoid smells that upset your stomach.  
  • You may have heard about these ways to prevent or relieve morning sickness. Talk to your provider before trying any of these:
  • Acupressure and acustimulation (also called electrical nerve stimulation) wristbands. These put pressure on or stimulate pressure points of the body to help prevent nausea.  
  • Acupuncture. This is a kind of treatment in which thin needles are put into your skin. Ask your provider for help finding an acupuncturist who is trained to work with pregnant women.
  • Ginger. Ginger ale, tea or candies may help relieve morning sickness.
  • Even if it’s legal where you live, it’s not safe to use marijuana to treat morning sickness. No amount of marijuana has been proven safe to use during pregnancy.

Is there medical treatment for morning sickness?

Yes. If you can’t relieve morning sickness on your own or if you have severe nausea and vomiting of pregnancy, your provider may treat you with these medicines:

  • Vitamin B6 and doxylamine. Your provider may treat you with these medicines separately. You can get vitamin B6 and doxylamine over-the-counter (OTC). Doxylamine is found in some OTC sleep aids.  Or your provider may prescribe you a medicine that combines them.
  • Antiemetic drugs. These are drugs that help prevent vomiting. If Vitamin B6 and doxylamine don’t work, your provider may prescribe an antiemetic drug for you. Not all are safe to use during pregnancy, so talk to your provider to make sure it’s safe to use.

Talk to your provider before you take any medicine during pregnancy.

When should you call your health care provider about morning sickness?

For most women, morning sickness is mild and goes away over time. But call your provider if:

  • Your morning sickness continues into your 4th month of pregnancy.
  • You lose more than 2 pounds.
  • Your vomit is brown in color or has blood in it. If so, call your provider right away.
  • You vomit more than 3 times a day and can’t keep food or fluids down.
  • Your heart beats faster than usual.
  • You’re tired or confused.
  • You’re making much less urine than usual or no urine at all.



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