Question: how long does morning sickness usually last?
Answer: Even though it's called morning sickness, it can last all day and happen any time of day. At least 7 in 10 pregnant women (70 percent) have morning sickness in the first trimester (first 3 months or the first 12 weeks) of pregnancy. It usually starts at about 6 weeks of pregnancy and is at its worst at about 9 weeks.