Motion sickness is a normal response of the body to unusual changes. The degree of motion sickness depends on many different factors, including pregnancy. Some women only experience motion sickness during pregnancy, or some have had motion sickness before, and the motion sickness becomes worse during pregnancy.

It is found that pregnant women are more prone to motion sickness. They feel nauseous and vomit when traveling. Some women only experience this when they are pregnant. For others, motion sickness precedes pregnancy and increases during pregnancy.