Morning sickness
What is morning sickness?
Morning sickness is nausea and vomiting during pregnancy. Despite its name, it can strike pregnant women at any time of the day.
Morning sickness is very common. Estimates vary, but up to around 85% of pregnant women experience some nausea or vomiting. [1] Fortunately, it tends to settle down by the 20th week of pregnancy and there are practical things you can do to reduce your symptoms and feel better.
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National antenatal care guidelines. The Department of Health. Accessed 10 October 2014, from
External link
Signs and symptoms
Morning sickness tends to start in the first month of pregnancy and stop by 16-20 weeks.
Symptoms include:
- Feeling nauseous or sick in the stomach;
- Loss of appetite and aversion to some foods, and;
- Vomiting.
Some women can feel anxious or depressed along with the morning sickness.
Symptoms of morning sickness include nausea and loss of appetite.
Causes
The cause of morning sickness is unclear. A range of theories have been suggested, such as changes in hormone levels, or reductions in blood pressure or blood glucose (sugar) level, but none of these theories have been proven.
You may be more likely to experience morning sickness if you:
- Have experienced morning sickness in a previous pregnancy;
- Tend to experience motion sickness;
- Have had gastrointestinal problems such as reflux or stomach ulcers;
- Have menstrual migraines;
- Experience nausea or vomiting when taking estrogen-based medication;
- Are having a multiple pregnancy, or;
- Are having a molar pregnancy.
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Hormone
A chemical substance secreted in one part of an organism and transported to another part of that organism, where it has a specific effect.
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Estrogen
One of a group of steroid hormones involved in the development and maintenance of female sex characteristics. These are the primary female sex hormones.
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Ulcers
An open sore in the skin or mucous membranes such as those of the stomach lining, intestine or mouth.
Methods for diagnosis
Your doctor will do a physical examination and ask about your symptoms.
If your doctor is concerned that another medical condition may be causing your symptoms, they may recommend other tests such as blood tests, a urine sample and an ultrasound.
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Blood tests
During a blood test, blood can be drawn using a needle or by a finger prick. Your blood can then be analyzed to help diagnose and monitor a wide range of health conditions.
Types of treatment
Taking steps to deal with morning sickness early in your pregnancy may help to reduce your level of symptoms. As well as helping you to feel better, it is important to be able to drink and eat enough so that you do not become dehydrated or lose weight.
Avoiding things that trigger your morning sickness
There are many things that can trigger morning sickness and they can vary between women. By working out what triggers your morning sickness and avoiding it you can reduce your symptoms.
Common triggers include:
- A range of smells and odors (such as perfumes, coffee, smoke and some foods);
- Stuffy, enclosed rooms;
- Lots of noise;
- Hot, humid environments;
- Flickering lights, and;
- Physical motion (such as driving).
Because motion is a trigger, you may be able to reduce your symptoms by:
- Moving slowly, particularly when getting out of bed or standing up from being seated, and;
- Avoiding excessive exercise.
Nutrition
What, when and how you eat can make morning sickness worse.
You may find it helpful to:
- Avoid eating spicy foods;
- Avoid eating a lot of high-fat or high-sugar foods;
- Eat foods high in protein, such as cheese, milk and yoghurt;
- Eat foods that have complex carbohydrates such as wholegrain crackers;
- Eat small amounts of food more frequently, rather than large meals;
- Drink small amounts of water frequently;
- Consume food and liquids separately;
- Try cold and frozen foods and drinks, and;
- Eat dry crackers before getting out of bed in the morning.
Following a healthy diet may reduce some symptoms of morning sickness.
Avoiding fatigue and stress
Morning sickness can be worse when you're tired and stressed, so pacing yourself and getting plenty of rest can help to reduce symptoms.
If you have symptoms of depression or anxiety, seeking advice from your doctor or a mental health professional may help.
Prenatal vitamin supplements
Some women can find that their morning sickness gets worse when taking prenatal vitamin supplements that contain iron. It may be helpful to take the supplement at night, before going to bed, rather than first thing in the morning. If symptoms continue to bother you, your doctor can advise what alternatives may be suitable for you.
Complementary therapies
Some complementary therapies, such as ginger supplements, acupressure and acupuncture, have been recommended for relieving morning sickness. However, there is variable evidence supporting the effectiveness and safety of many of these therapies.
Ginger
There is evidence that products containing ginger may be helpful to pregnant women experiencing nausea and vomiting. The safety of taking high doses of ginger is unclear. If you wish to use ginger products, your doctor can discuss what may be suitable for you.
Acupuncture
Acupuncture is an alternative therapy that involves fine needles being inserted at various points of the body in order to provide health benefits. It has not been shown to relieve nausea and vomiting in pregnant women.
Acupressure
Acupressure is an alternative therapy based on acupuncture that involves a therapist applying pressure at various points of the body in order to provide health benefits. Applying pressure to the lower forearm has been studied for relieving nausea and vomiting in pregnant women; however, evidence is limited regarding its effectiveness.
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Prenatal
Before the birth of a baby.
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Iron
An essential mineral required by the body. Iron is part of a protein in the blood called hemoglobin, which carries oxygen around the body.
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Protein
1. One of the three macronutrients in foods that supply the body with energy. Food rich in proteins include meats, legumes and dairy foods. 2. Large molecules, such as antibodies and albumin, that are found in the blood.
Medications
Many women with mild symptoms do not require medications for morning sickness. However, if symptoms are bothering you, there are safe medications you can take. Remember to discuss any new medications with your doctor before you start taking them as not all medications are safe to take during pregnancy - this includes over-the-counter medications, nutritional supplements and herbs.
Pyridoxine
Pyridoxine (vitamin B6) can be taken to help reduce mild to moderate nausea. It is important to follow your doctor's recommendations regarding taking pyridoxine because in high levels it may cause health problems. Taking 200 mg/day has been shown to be safe for pregnant women.
Antiemetics
Antiemetics are medications that can help reduce vomiting. They may often be combined with pyridoxine for morning sickness. If you think that you may require medication it is best to discuss this option with your doctor.
Treatment of severe morning sickness
While most women experience mild to moderate symptoms of morning sickness that gradually get better without treatment, a small percentage of women experience severe, persistent nausea and vomiting that can last the entire pregnancy. This condition is called hyperemesis gravidarum.
Persistent vomiting can lead to dehydration which, if severe, can be dangerous and may require hospitalization.
Signs that you may require further care include:
- Dehydration (look for dark-colored urine, urinating infrequently, or being dizzy while standing);
- Vomiting continually throughout the day;
- Blood in the vomit;
- Being unable to keep any food or liquids in your stomach for more than 12 hours, and;
- Losing weight.
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Dehydration
The state of insufficient hydration; excessive loss of water; requiring more water in order to function normally.
Potential complications
Whilst unpleasant, morning sickness usually does not cause any harm to pregnant women and their babies. In fact, women with mild morning sickness symptoms have been shown to be less likely to experience miscarriage or stillbirth than women who do not experience it.
Oral health
Vomit is quite acidic and this can damage the tooth enamel. However, avoid brushing your teeth directly after vomiting. Waiting 30 minutes before brushing your teeth can help to avoid further weakening of the enamel.
In the meantime, you can:
- Rinse your mouth out with water or a mouthwash straight after vomiting;
- Rub toothpaste on your teeth with your finger, and;
- Chew sugar-free gum, which helps to stimulate saliva and neutralize the acid.
If excessive saliva is a problem, spitting or using a mouthwash can help.
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Miscarriage
The loss of a pregnancy before 20 weeks.
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Stillbirth
The death of a fetus after 20 weeks of pregnancy.
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Tooth enamel
The outer layer of the tooth. Typically 1-2mm thick, this is the whitest part of the tooth, forming a protective shell over the underlying dentine.
Prognosis
Most women who have nausea and vomiting due to morning sickness recover without any ongoing health problems for themselves or their babies.
Prevention
While it is not possible to prevent morning sickness, taking steps to reduce symptoms when they first occur may reduce the severity of symptoms.
References
- National antenatal care guidelines. The Department of Health. Accessed 10 October 2014, from link here
- 1492.pdf. Accessed July 31 2014. link here
- 7.8 Nausea and Vomiting. Accessed August 1 2014. link here
- Hyperemesis Gravidarum - National Library of Medicine - PubMed Health. Accessed July 31 2014. link here
- Interventions for Nausea and Vomiting in Early Pregnancy | Cochrane Summaries. Accessed August 1 2014. link here
- Morning Sickness - National Library of Medicine - PubMed Health. Accessed July 31 2014. link here
- Nausea and Vomiting of Pregnancy. Accessed July 31 2014. link here
- Pregnancy - Morning Sickness | Better Health Channel. Accessed July 31 2014. link here
- Department of Health | National Antenatal Care Guidelines. Accessed October 10 2014. link here
10 Most frequently asked questions (FAQs)
What is morning sickness? Morning sickness is nausea and vomiting during a pregnancy. Despite its name, it can strike pregnant women at any time of the day. What causes morning sickness? The exact causes of morning sickness are not clear. A range of theories have been suggested, including changes in hormone levels, or reductions in blood pressure or blood glucose (sugar) level, but none of these has been proven. You are more likely to experience morning sickness if you: have experienced morning sickness in a previous pregnancy; tend to experience motion sickness; have had gastrointestinal problems, such as reflux or stomach ulcers; have menstrual migraines; experience nausea or vomiting when taking estrogen-based medication; are having a multiple pregnancy, or; are having a molar pregnancy. How is morning sickness treated? There are many things that can trigger morning sickness and they can vary between women. By working out what triggers your morning sickness and avoiding it, you can reduce your symptoms. Common triggers include stuffy rooms, lots of noise and strong smells. Because motion can be a trigger, you may be able to reduce your symptoms by moving slowly, particularly when getting out of bed or standing up from being seated, and by avoiding excessive exercise. A change in your diet may treat morning sickness. You may find it helpful to eat high-protein foods, eating smaller meals more frequently rather than larger servings, and eating some dry crackers upon waking. Complementary therapies, such as eating ginger, or having acupuncture or acupressure, may also ease your symptoms. If symptoms persist and are severe, your doctor can prescribe you medications that will be safe to take during pregnancy. What can be done at home to treat morning sickness? You can reduce symptoms of morning sickness by avoiding smells foods and other things that trigger nausea and vomiting. Take care to move slowly, particularly when getting out of bed, and avoid fatigue and stress. Is morning sickness serious? While most women experience mild to moderate symptoms of morning sickness that gradually improve without treatment, a small percentage of women experience severe, persistent nausea and vomiting that can last the entire pregnancy. This condition is called hyperemesis gravidarum. Persistent vomiting can lead to dehydration which, if severe, can be dangerous and may require hospitalization. Signs that you may require further care include: dehydration (look for dark-colored urine, urinating infrequently, or feeling dizzy while standing); vomiting continually throughout the day; blood in the vomit; being unable to keep any food or liquids in your stomach for more than 12 hours, and; losing weight. What increases the chances of developing morning sickness? You may be more likely to experience morning sickness if you: have experienced morning sickness in a previous pregnancy; tend to experience motion sickness; have had gastrointestinal problems such as reflux or stomach ulcers; have menstrual migraines; experience nausea or vomiting when taking estrogen-based medication; are having a multiple pregnancy, or; are having a molar pregnancy.
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