Nausea & Digestion
Morning Sickness in Pregnancy
Nausea and vomiting in early pregnancy — common, usually harmless, and eases by mid-pregnancy for most people.
Written and fact-checked by the ParentVibes editorial team against WHO, NHS, ACOG and peer-reviewed guidance. Not yet reviewed by a named clinician.
Quick facts
- When it starts
- Around weeks 5–6
- When it usually eases
- Weeks 14–16
- How common
- Up to ~7 in 10 pregnancies
- Time of day
- Any time — not just mornings
- See a doctor if
- You can't keep fluids down for 24h
If you feel queasy — or find yourself being sick — in the first weeks of pregnancy, you're in very good company. "Morning sickness" is one of the earliest and most common signs of pregnancy, even though it's a bit of a misleading name: the nausea can happen morning, noon or night.
For most people it's unpleasant but not harmful, and it tends to settle as you move into the second trimester. This guide explains why it happens, what's considered normal, the self-care that genuinely helps, and the warning signs that mean you should be checked.
What is morning sickness?
Morning sickness is the nausea (feeling sick) and vomiting (being sick) that commonly occurs in early pregnancy. It usually begins around the 5th to 6th week, often peaks around weeks 9–10, and eases for most people by weeks 14–16. A smaller number continue to feel nauseous for longer, and occasionally it lasts the whole pregnancy.
Symptoms range widely. Some people feel only mild, passing queasiness; others feel sick for much of the day and vomit repeatedly. It is often worse on an empty stomach and can be set off by certain smells, tastes, tiredness or stress. Mild-to-moderate morning sickness does not harm your baby, and there is some evidence it is associated with a lower risk of miscarriage — though its absence is also completely normal and not a cause for worry.
It's not always the morning
Studies suggest fewer than 2 in 10 people get nausea only in the morning. For most it comes and goes through the day, so don't dismiss all-day queasiness as 'something else'.
What causes morning sickness?
The exact cause isn't fully understood, but it's strongly linked to the normal hormonal surge of early pregnancy. Several factors can make it worse.
Pregnancy hormones (hCG and oestrogen)
Levels of human chorionic gonadotropin (hCG) rise quickly in early pregnancy and peak around the time nausea is usually worst. Rising oestrogen is also thought to play a part. Recent research points to a hormone called GDF15 as a key driver of how sick you feel.
A heightened sense of smell
Many people become far more sensitive to smells in pregnancy. Cooking odours, coffee, perfume or cigarette smoke can suddenly trigger a wave of nausea.
An empty or over-full stomach
Nausea is often worst when your blood sugar is low — for example first thing in the morning — but a very full stomach can trigger it too.
Tiredness and stress
Being run-down, poorly rested or anxious can all make nausea feel worse, which is part of why rest helps.
Carrying more than one baby
Twins or higher-order pregnancies produce more pregnancy hormones, and morning sickness (and its severe form) is more common with them.
You may be more likely to get it if…
- You had bad morning sickness in a previous pregnancy
- You get motion sickness or migraines
- There's a family history of severe pregnancy sickness
- You're expecting twins or more
When morning sickness is normal
Mild-to-moderate nausea and occasional vomiting are a normal, expected part of early pregnancy for most people. The following are reassuring:
- Nausea that comes and goes and is manageable with snacks, rest and fluids.
- Being sick occasionally but still able to keep down fluids and some food across the day.
- Symptoms that start in the first trimester and gradually ease by around weeks 14–16.
- Passing your urine normally and feeling otherwise well between bouts of nausea.
| Usually normal morning sickness | Needs medical attention | |
|---|---|---|
| Vomiting | A few times a day at most; settles between times | Repeated, unable to stop; nothing stays down |
| Fluids | You can sip and keep fluids down | Can't keep any fluids down for 24 hours |
| Weight | Weight stable or a small early dip | Losing weight (e.g. more than ~5% of pre-pregnancy weight) |
| How you feel | Tired and queasy but otherwise well | Dizzy, faint, very dark urine, racing heart, unwell |
No nausea? Also normal.
Around 3 in 10 people get little or no morning sickness, or it stops early. On its own this is not a sign that anything is wrong.
Warning signs — get medical help now
Occasionally nausea and vomiting become severe (a condition called hyperemesis gravidarum) or signal another problem. Contact your doctor or midwife urgently — or go to your nearest emergency department — if you have any of the following:
Seek urgent medical care if you have
- You can't keep any food or fluids down for 24 hours.
- You're vomiting repeatedly and can't stop.
- Very dark yellow urine, or you haven't passed urine in more than 8 hours.
- Signs of dehydration: extreme thirst, dizziness or fainting, a fast heartbeat.
- You've lost weight or feel you're getting weaker.
- Vomiting blood, or vomit that looks like coffee grounds.
- Tummy pain, fever, or vomiting for the first time in the second half of pregnancy.
Severe pregnancy sickness (hyperemesis gravidarum) is treatable — often with anti-sickness medicines and fluids — and getting help early makes a real difference. You do not have to 'just cope'.
Dehydration is the main risk
The danger of severe sickness is dehydration, not the nausea itself. If you can't keep fluids down, don't wait it out at home — you may need anti-sickness treatment or a fluid drip.
Self-care & home remedies
Most morning sickness can be eased at home. Nothing works for everyone, so try a few of these and keep what helps.
Eat little and often
- Have small snacks every 1–2 hours rather than three big meals.
- Keep plain crackers or a dry biscuit by the bed and nibble before you get up.
- Favour bland, starchy, low-fat foods (toast, rice, plain crackers, bananas).
- Don't go for long stretches with an empty stomach.
Fluids & hydration
- Sip fluids often through the day rather than large amounts at once.
- Try cold, fizzy or sharp drinks (e.g. water with lemon) if plain water turns your stomach.
- If you're being sick, small frequent sips help you hold fluids down.
Ginger
- Ginger tea, ginger biscuits or fresh ginger help many people and is considered safe in pregnancy.
- Check with your pharmacist before using ginger supplements.
Acupressure wristbands (worn on the inner wrist) help some people and are harmless to try.
Manage triggers
- Note which smells or foods set you off and avoid them where you can.
- Ask someone else to cook if cooking smells are a trigger; eat food cold or at room temperature.
- Get plenty of rest — tiredness makes nausea worse.
- Get fresh air and open windows when a wave hits.
Ask about anti-sickness treatment
If home measures aren't enough, safe anti-sickness medicines can be prescribed in pregnancy. Vitamin B6 also helps some people. Speak to your doctor or midwife — don't buy remedies online without checking they're safe in pregnancy.
When to consult a doctor
Book a non-urgent chat with your doctor or midwife (rather than waiting for your next routine appointment) if:
- Nausea or vomiting is interfering with your daily life, work or ability to eat.
- Home remedies aren't helping and you'd like to try anti-sickness treatment.
- You're worried about getting enough nutrition or fluids.
- Symptoms are unusually severe, or start suddenly after the first trimester.
- You have a health condition (e.g. diabetes) that vomiting could affect.
Track how you're feeling
Logging your symptoms day by day helps you spot patterns and gives your midwife a clear picture at your next appointment.
Open the Pregnancy TrackerFrequently asked questions
When does morning sickness usually start and stop?
It typically begins around weeks 5–6 of pregnancy, is often worst around weeks 9–10, and eases for most people by weeks 14–16. Some people feel nauseous for longer, and a small number for the whole pregnancy.
Is it bad if I have no morning sickness at all?
No. Around 3 in 10 people have little or no morning sickness, and it's not a sign that anything is wrong. Symptoms and hormone levels vary a lot from person to person.
Does morning sickness harm my baby?
Mild-to-moderate morning sickness does not harm your baby, even if you're struggling to eat much. The main risk with severe, persistent vomiting is dehydration in you — which is why keeping fluids down matters and why severe sickness needs treatment.
What actually helps morning sickness?
Eating small amounts often, avoiding an empty stomach, sipping fluids regularly, ginger, rest and avoiding trigger smells help most people. If that isn't enough, your doctor can prescribe anti-sickness medicine that's safe in pregnancy.
What is hyperemesis gravidarum?
It's a severe form of pregnancy sickness where relentless vomiting stops you keeping food or fluids down, leading to dehydration and weight loss. It affects a small percentage of pregnancies, is more than 'bad morning sickness', and needs medical care — often fluids and anti-sickness medicines.
When should I go to hospital for morning sickness?
Seek urgent care if you can't keep any fluids down for 24 hours, have very dark urine or haven't passed urine for over 8 hours, feel dizzy or faint, have a racing heart, are losing weight, or are vomiting blood. These can be signs of dehydration or hyperemesis that need treatment.
Your next steps
Track your pregnancy
Log symptoms week by week, get personalised tips, and see how your pregnancy is progressing.
Open Pregnancy TrackerPregnancy week-by-week
Follow your baby's growth and your body's changes from week 1 to 40 in plain language.
Explore the guideFind a gynaecologist
Have a personal concern? Book with a trusted obstetrician or gynaecologist near you.
Find a doctorRelated pregnancy symptoms
Helpful resources
Sources
- NHS — Pregnancy: common symptoms & concerns
- ACOG — Pregnancy resources (American College of Obstetricians and Gynecologists)
- WHO — Maternal health & pregnancy care
- NHS — Vomiting and morning sickness in pregnancy
- ACOG — Morning Sickness: Nausea and Vomiting of Pregnancy
Next review due: 6 January 2027.
Medical disclaimer
This page is general information about a common pregnancy symptom and does not replace personal medical advice. Every pregnancy is different. If you have severe pain, heavy bleeding, a bad headache with vision changes, reduced or absent baby movements, breathing difficulty, fever, or you feel something is seriously wrong, contact your doctor or midwife or go to your nearest emergency department straight away. When in doubt, always get checked — it is never a waste of anyone's time.
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