Morning sickness typically starts around the 4th to 6th week of pregnancy and most often ends by the end of the first trimester, around 12 to 14 weeks. For many women, symptoms peak between 8 and 10 weeks and then begin to subside. However, some women may experience morning sickness lasting into the second trimester, around 16 to 20 weeks or even longer in rare cases. A small number of women may have symptoms throughout the entire pregnancy. In summary:
- Most common duration: weeks 6 to 12 (peak 8-10 weeks)
- Generally improves or ends by 12 to 14 weeks
- Can last until 16 to 20 weeks or beyond for some
- Rarely lasts throughout the full pregnancy
This variation depends on individual hormonal changes and sensitivity during pregnancy.
