Nausea in pregnancy (often called morning sickness) usually starts around 4–6 weeks of pregnancy, and most commonly by about week 6. Some people notice it a bit earlier, as soon as roughly 2 weeks after conception (about 4 weeks pregnant), while others may not feel nauseous until closer to weeks 7–9.

Typical timing

• Many sources report nausea starting between the 4th and 7th week of pregnancy.

• It often peaks around weeks 8–11 and usually eases by around weeks 12–14, though it can last longer for some.

When to seek help

• If nausea is very severe, you cannot keep fluids down, or you are losing weight, contact a healthcare professional to rule out hyperemesis gravidarum, a more serious form of pregnancy sickness.

• Even milder nausea that interferes with eating or daily life is worth discussing with a doctor or midwife, as there are safe treatments during pregnancy.