Your body

Does morning sickness only happen in the morning?

Checked against the sources listed on this page. Not reviewed by a clinician. Last updated 5 November 2026. How we check.

Myth

No. For most people, pregnancy nausea can strike at any time of day, and for some it lasts all day.

The name is misleading. Nausea is often worse on an empty stomach, which is why mornings can be hard, but only a minority have symptoms limited to the morning.

It often starts around weeks 4–6. The NHS says it usually improves or stops somewhere between 12 and 20 weeks.

References

  1. Lacroix R et al. Nausea and vomiting during pregnancy: a prospective study. American Journal of Obstetrics & Gynecology, 2000
  2. NHS: Vomiting and morning sickness
  3. NHS: Severe vomiting in pregnancy

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