If the fetus is developing well, it is normal for the vomiting to subside by 9 weeks. Pregnancy sickness is a common early pregnancy reaction that usually starts at 6 weeks and gradually subsides at 12 weeks. However, it varies from person to person. Some women may not experience pregnancy sickness, while others may experience it until late in their pregnancy. It varies from person to person depending on their body type, environment and stress. At 9 weeks of pregnancy, when the vomiting starts to subside, you can go to the hospital for an ultrasound examination to find out the development of the fetus, such as whether there are any cases of fetal arrest and so on. If the fetus is developing well, it is normal for the vomiting to subside and there is no need to worry too much. Pregnant women should eat more food rich in protein during pregnancy, such as eggs, lean pork, soy products, milk and so on. Also need to appropriate supplement shrimp, fish, pork liver, oats, walnuts, peanuts and other foods, eat more fresh vegetables and fruits, to ensure that the intake of food nutritionally balanced, to avoid a single nutrition. Pregnant women during pregnancy should pay attention to do a good job of prenatal checkups, actively listen to the advice of professional doctors to do a good job of comprehensive care and health care, pay attention to rest, at the same time should be relaxed, to avoid nervousness, anxiety, there is any discomfort should be timely to the hospital, by the doctor to clarify the diagnosis, and cooperate with the doctor to deal with the symptoms.