Nausea in pregnancy (often called morning sickness) usually starts around 4–6 weeks of pregnancy for many people, but anywhere from about 4–9 weeks is considered normal. It often peaks around weeks 8–11 and tends to ease by the end of the first trimester, though some continue to feel queasy longer.

Typical start time

  • Many guides note that nausea can begin as early as 4 weeks pregnant, about the time of a missed period.
  • Large medical organizations say nausea and vomiting “usually” start before 9 weeks of pregnancy.
  • Some people even report symptoms as soon as two weeks after conception (which counts as about 4 weeks pregnant), while others never develop nausea at all.

How long it usually lasts

  • Nausea often gets worse and peaks between about 8 and 11 weeks of pregnancy.
  • For most, symptoms improve or disappear around week 13–14, at the end of the first trimester.
  • A smaller group has symptoms into the second or even third trimester, and a few have it nearly the whole pregnancy.

What if you don’t feel nauseous?

  • Not having nausea by 7–8 weeks does not automatically mean anything is wrong with the pregnancy; some people simply never get morning sickness.
  • Experiences shared in pregnancy forums show wide variation: some start feeling sick right after a missed period, others not until 8–9 weeks, and some never at all but still have healthy babies.
  • If you are worried about lack of symptoms or a sudden change (like nausea stopping very abruptly), checking in with a healthcare provider or midwife is always reasonable.

When to call a doctor

  • Seek medical care urgently if you cannot keep fluids down for 24 hours, are vomiting multiple times a day, feel dizzy or faint, or see signs of dehydration (very dark urine, not peeing much).
  • These can be signs of hyperemesis gravidarum, a more severe form of pregnancy nausea that sometimes needs medication or IV fluids but can be managed safely with proper care.

Information gathered from public forums or data available on the internet and portrayed here.