Morning sickness typically starts around the sixth week of pregnancy, with most women experiencing symptoms before nine weeks

. Some may notice mild nausea as early as four to five weeks, or even a few days before a missed period, but six weeks is the most common onset time

. The symptoms usually peak between weeks 8 and 10 or 8 and 11 and tend to improve or resolve by the end of the first trimester, around 13 to 14 weeks

. Despite its name, morning sickness can occur at any time of day and may last throughout the day for many women

. While most women have mild symptoms that subside after the first trimester, some may experience more severe or prolonged nausea and vomiting, requiring medical attention

. In summary:

• Morning sickness usually starts around 6 weeks of pregnancy.
• Symptoms peak between 8 to 11 weeks.
• Most women improve by 13 to 14 weeks (end of the first trimester).
• Onset can be gradual or sudden and varies between individuals