Nausea in pregnancy (often called “morning sickness”) usually starts around 5–6 weeks of pregnancy, but it can begin as early as 4 weeks and as late as 9 weeks for some people. It often peaks around weeks 8–11 and tends to ease by about 12–16 weeks, though a minority have symptoms longer.

How Soon Can You Feel Nausea?

Most people who will get nausea in pregnancy notice it shortly after a missed period.

  • Many start feeling queasy between 4–6 weeks pregnant, sometimes suddenly.
  • Large medical organizations note that nausea and vomiting “usually” begin before 9 weeks.
  • Symptoms often improve by the end of the first trimester (around 12–14 weeks), but can last to 16–20 weeks or, rarely, all pregnancy.

A useful mental note: if you are around 5–6 weeks pregnant and feeling fine, nausea may still show up over the next couple of weeks—every body is different.

What Does Early Pregnancy Nausea Feel Like?

Early nausea can be subtle or intense and may not be limited to mornings.

  • Common feelings include queasiness, food aversions, heightened sense of smell, and gagging when hungry or after certain odors.
  • It can occur any time of day or night, not just in the morning.
  • Some people only feel mild waves of nausea; others have frequent vomiting, which can occasionally become a condition called hyperemesis gravidarum that needs medical care.

Why Nausea Starts When It Does

Hormonal shifts are the main reason nausea often appears in early weeks.

  • Levels of human chorionic gonadotropin (hCG) and other hormones rise quickly in the first trimester, peaking around weeks 8–10, matching the usual peak in nausea.
  • As these hormones plateau later in the first trimester, many people notice their nausea easing.

When To Call A Doctor

Nausea is usually a normal part of pregnancy, but there are times to seek help.

  • Get medical advice if you cannot keep fluids down, are vomiting multiple times a day, lose weight, feel dizzy or faint, or see signs of dehydration (very dark urine, dry mouth, no urination for 8+ hours).
  • Safe treatments (diet changes, vitamin B6, sometimes medications) are available and can make symptoms more manageable; these should be discussed with a healthcare professional who knows your history.

TL;DR: You can feel nausea in pregnancy as early as 4 weeks, most commonly around 5–6 weeks, it tends to peak near 8–11 weeks, and often eases by 12–16 weeks, though this varies widely.

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