How Soon Can You Get Morning Sickness?

What is morning sickness?

Morning sickness is a common side effect in pregnancy. Morning sickness occurs in the first trimester and can be an early sign of pregnancy.
Morning sickness is a common side effect in pregnancy. Morning sickness occurs in the first trimester and can be an early sign of pregnancy.

Morning sickness is a common side effect of pregnancy. Sometimes you can get morning sickness before you know you are pregnant. Typically, morning sickness starts in the sixth week of pregnancy which is about two weeks after your first missed period. About 70% of women experience morning sickness in their first trimester of pregnancy.

A common misconception about morning sickness is due to its name. Morning sickness can actually occur during any time of day. Morning sickness has been described to feel like seasickness. While it starts as early as the sixth week, it usually goes away by the 12th or 14th week, once you’ve reached the second trimester.

Morning sickness is caused by changing hormone levels and a heightened sense of smell. This can cause you to develop an aversion to certain scents and smells. Morning sickness can linger throughout the first trimester, making you feel constantly queasy, triggered by specific smells.

Signs and symptoms of morning sickness

Morning sickness occurs in the first trimester and can be an early sign that you are pregnant. When you get morning sickness, it can last and occur longer than just the morning. Common symptoms of morning sickness include: 

Nausea and queasiness

Nausea is the main symptom of morning sickness. It can occur after you eat, when you smell specific scents, or remain throughout the day. Sometimes your nausea and queasiness can be so strong, usually in the morning, that it leads to vomiting

Aversions to certain smells

Some scents may seem so powerful to you that they become overwhelming and can lead to nausea or vomiting. This can be food, perfume, or other strong scents. This is unique to each person and will develop as your pregnancy progresses. 

Seasick feeling

Before you know that you’re pregnant, you might not understand why you are feeling seasick or carsick. This feeling may also be accompanied by hunger pains. 

Causes of morning sickness

Morning sickness is a side effect of pregnancy but not all women get morning sickness and not all morning sickness occurs in the morning. Doctors do not know specifically what causes morning sickness but they do suspect some causes, such as: 


Doctors believe that the increase of hormones can cause morning sickness. The pregnancy hormone hCG reaches its highest level when morning sickness is at its worst. The increase of estrogen and progesterone can also make it hard for your body to digest food properly.


Some people are more sensitive to nausea and an upset stomach which can make them more likely to have vomiting during pregnancy. If you have a sensitive stomach, you are more likely to experience morning sickness in your first trimester than those who don’t have a sensitive stomach. 


Emotional stress can cause gastrointestinal problems, and when you are pregnant, you are more prone to morning sickness when you are stressed. 

When to see the doctor for morning sickness

Morning sickness is a normal part of early pregnancy. There are methods of coping you can do at home. But if you are vomiting and your morning sickness is accompanied by the following symptoms you should schedule an appointment with your doctor immediately:

  • Dark-colored urine or have not peed in more than 8 hours
  • Blood or pain when you pee
  • Unable to keep food or fluids down for 24 hours
  • Feel weak, dizzy, or faint when standing up
  • Abdominal pain
  • Weight loss

These may be signs of a urine infection or dehydration and should be treated quickly. 

Diagnosing morning sickness

If you feel like you’re going to vomit or are vomiting constantly and visit your doctor, they will diagnose you with morning sickness. They do not need to run tests to determine you have morning sickness. If you have morning sickness before you know you are pregnant the doctor may run a blood test to confirm your pregnancy.

Treatments for morning sickness

Morning sickness will usually go away on its own after your first trimester of pregnancy. There are treatments you can do at home to alleviate your nausea and reduce the morning sickness. These remedies include: 

  • Taking prenatal vitamins
  • Vitamin B6
  • Eating small meals throughout the day to ease digestion
  • Avoiding spicy or greasy meals
  • Getting plenty of rest
  • Drinking plenty of fluids
  • Pregnancy supplements

If your morning sickness is severe, you can talk to your doctor about Food and Drug Administration (FDA) approved medication for reducing nausea during pregnancy. Do not take medication during pregnancy unless it has been approved by your doctor. 


The first sign of pregnancy is most often: See Answer

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Frontiers in Psychology: "Pregnancy and olfaction: A review."

Health Partners: "Morning sickness: When does it start and what can I do about it?"

NHS: "Vomiting and morning sickness in pregnancy."

Sanford Health: "How to enjoy, not just endure, morning sickness."