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Nausea & GI Routine

Morning sickness

Also known as Nausea and vomiting of pregnancy, NVP. Usually 6–14 weeks, peaking around 9 weeks.

The nausea usually arrives around week 6, crests near week 9, and lifts for most people as the first trimester closes. Despite the name it keeps no schedule and can hit any hour. It is miserable, but mild to moderate morning sickness is harmless to you and your baby, and it actually tracks with a slightly lower risk of miscarriage. This page covers what genuinely helps, and the point at which nausea stops being ordinary and needs treatment.

Know the warning signs When to call a provider
How common
About 7 in 10 pregnancies
Nausea affects roughly 50% to 80% of pregnancies.
When
First trimester
Starts around 6 weeks, worst near 9, eases by about 13 to 14 weeks.
Urgency
Routine
Usually self-managed; escalate if you cannot keep fluids down.
Outlook
Reassuring
Not harmful, and linked to a lower miscarriage risk.

Understanding it

What is morning sickness?

Morning sickness, properly nausea and vomiting of pregnancy, is one of the defining experiences of the first trimester. Some nausea affects roughly 7 in 10 pregnancies, and about half bring vomiting. Despite the name it can run all day, or flare at a particular smell or food.

It usually begins around 6 weeks, peaks near 9, and settles for most people by about 13 to 14 weeks. A minority carry it longer; a few, the whole pregnancy. The pattern shadows hCG, the pregnancy hormone that rises fastest in these early weeks.

The cause is hormonal, if not fully mapped. Rising hCG and estrogen contribute, and recent research points hard at GDF15, a placental hormone, and how sensitive your brain is to it. None of this harms your baby; if anything, early nausea tracks with a lower miscarriage risk.

One line matters. When vomiting causes dehydration and the loss of more than 5% of your pre-pregnancy weight, it is no longer ordinary morning sickness but hyperemesis gravidarum, which needs treatment. Knowing that line, and the warning signs, matters most.

Symptoms

What are the symptoms?

Nausea, with or without vomiting and often triggered by smells or foods, is the whole picture for most people. Watch for the signs that it has crossed into hyperemesis gravidarum.

Early signs

  • Nausea that comes and goes or lingers much of the day
  • Vomiting, in about half of pregnancies
  • Queasiness set off by certain smells or foods
  • A heightened sense of smell
  • Feeling worse on an empty stomach

Emergency signs — call 911

  • Keeping no food or fluids down
  • Little or very dark urine, or feeling dizzy or faint when you stand
  • A racing heart
  • Losing weight, or vomiting more than three times a day
  • Vomiting blood

Why it matters

Risks to you and baby

Usually no risk at all

Mild to moderate morning sickness does not harm your baby or its growth. For the great majority it is wretched but medically harmless.

A reassuring association

Nausea and vomiting in early pregnancy is tied to a lower risk of miscarriage. It guarantees nothing, but it is not a bad sign.

When it becomes hyperemesis gravidarum

If vomiting brings dehydration and the loss of more than 5% of your pre-pregnancy weight, it has become hyperemesis gravidarum, which does need treatment.

The toll on daily life

Even when harmless, weeks of feeling sick wear on work and mood. That is real, and reason enough to ask about treatment rather than just endure it.

How it's found

How is it diagnosed?

Morning sickness is a clinical diagnosis from your history; there is no test for it. Tests mainly gauge severity or check for hyperemesis gravidarum.

History and exam

The pattern and timing of your nausea, and how well you hold down food and fluids, are enough to diagnose ordinary morning sickness.

Severity check

A short scoring tool (the PUQE score) can gauge how severe the nausea and vomiting are and whether to step up treatment.

Urine and blood tests

If hyperemesis is suspected, urine ketones and blood tests for dehydration and electrolytes help confirm it. An ultrasound may check for twins or a molar pregnancy.

Whenever nausea and vomiting begin. Testing is added only if you are losing weight, cannot stay hydrated, or symptoms seem severe.

Treatment

How is it managed?

Most morning sickness is handled at home, and the aim is simply comfort. If simple measures fall short, there is a clear ladder to climb.

Treatment paths

Start with the basics: small, frequent, bland meals so your stomach is never empty; crackers by the bed for before you rise; ginger; steady fluids; and avoiding your trigger smells and foods. If that is not enough, vitamin B6 (pyridoxine), often paired with the antihistamine doxylamine, is the usual next step and is safe in pregnancy. If nausea stops you eating or drinking, ask about prescription anti-nausea medicines rather than toughing it out.

Medication

Vitamin B6 is the usual first medication, and a doxylamine and pyridoxine combination (sold as Diclegis) is FDA-approved for nausea and vomiting of pregnancy. Additional antiemetics are available if needed.

Can it recur?

It commonly returns in later pregnancies, and a severe bout before makes another more likely. If it was hard last time, you and your provider can start measures early. It reliably ends after birth.

What you can do

Can it be prevented?

  • Take a prenatal multivitamin around conception

    Starting a prenatal multivitamin before or in the earliest weeks is linked to a lower chance of more severe nausea.

  • Eat ahead of the nausea

    Keeping something small in your stomach, before you rise and every couple of hours, heads off the empty-stomach queasiness that makes it worse.

  • Treat early if you have had it badly before

    If a past pregnancy brought severe nausea, ask about starting vitamin B6 or anti-nausea treatment at the first symptoms this time.

Who is more at risk

Risk factors

A high-hormone pregnancy
Carrying twins or more means higher hormone levels, which is linked to more nausea.
A personal or family history
Severe morning sickness before, or a mother or sister who had it, raises your risk.
A family history can roughly triple the risk of the severe form
A tendency to motion sickness or migraines
People prone to motion sickness, or to nausea with migraines, are more likely to feel it in pregnancy.
Carrying a girl
Some studies find severe morning sickness slightly more common when carrying a female baby.

Do not wait

When to call your provider or 911

  • Call for signs of dehydration: keeping no food or fluids down, little or very dark urine, dizziness or faintness on standing, or a racing heart.
  • Call if you are losing weight, vomiting more than three times a day, or vomiting blood.
  • Call if nausea and vomiting keep you from eating, drinking, working, or caring for yourself.
  • Reach out if morning sickness continues past the first trimester without improving on home measures.
  • If a past pregnancy brought severe nausea, call early so treatment can start before it escalates.

Talking to your team

Questions to ask your provider

  • Which self-care measures and medications do you recommend for me?
  • Is it safe to take vitamin B6 and doxylamine, and at what dose?
  • At what point would my nausea count as hyperemesis gravidarum?
  • What signs of dehydration should send me in?
  • Are the foods and remedies I am trying safe in pregnancy?
  • If this gets worse, what is the next step?

Keep reading

More on morning sickness

All pregnancy guides articles

Good to Know

Morning sickness FAQs

Common questions about morning sickness, answered.

Is morning sickness only in the morning?

No. The name is a misnomer: it can strike any hour, and for many people it lasts much of the day or is triggered by certain smells and foods.

Is it bad that I feel so sick, or bad that I do not feel sick at all?

Neither. Nausea tracks with a slightly lower miscarriage risk, but plenty of healthy pregnancies bring little or none. The amount is not a reliable gauge of how the pregnancy is going.

Will morning sickness hurt my baby?

Mild to moderate morning sickness does not. Only the severe form, hyperemesis gravidarum, with dehydration and significant weight loss, needs treatment to protect you both.

When will it go away?

For most people, by about 13 to 14 weeks. Some carry it longer and a few throughout, but the majority feel much better in the second trimester.

What actually helps?

Small, frequent, bland meals, crackers before getting up, ginger, sipping fluids, and dodging trigger smells. If that falls short, vitamin B6 with doxylamine is a safe next step, and stronger anti-nausea medicines exist.

Is it safe to take medication for it?

Yes. Vitamin B6 and the doxylamine and pyridoxine combination are well studied and considered safe in pregnancy, with stronger antiemetics when needed. You do not have to just endure it.

When is it more than morning sickness?

When vomiting causes dehydration and the loss of more than 5% of your pre-pregnancy weight, it is hyperemesis gravidarum. Keeping nothing down, dark or scant urine, dizziness, or a racing heart are signs to call your provider.

Will I get it again next time?

Often. It commonly recurs, and a severe bout before makes another more likely. The upside: you can plan ahead and treat early next time.

Medically Reviewed · Updated

Reviewed by Dr. Grace Lin, MD, FACOG · OB-GYN

Obstetrician-gynecologist focused on reproductive and sexual health for women: pregnancy, BV, yeast, trichomoniasis and HPV/cervical screening. Our editorial guidelines →

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