Morning sickness and dry heaves occurring while pregnant is usually a normal early pregnancy reaction, caused by elevated hormone levels in the body, which are difficult for the digestive system to adjust to. In the early stages of pregnancy, as hormone levels rise, most women will experience an early pregnancy reaction. Early pregnancy reactions often occur at 6 weeks of pregnancy and are most intense at 8 to 10 weeks, manifesting as nausea, vomiting, and loss of appetite. Usually at 12 weeks of pregnancy, this symptom will gradually disappear, which is normal and usually can get better without special intervention. Women who experience more severe dry heaving and morning sickness during pregnancy are advised to seek medical attention in order to prevent electrolyte disorders and to adopt appropriate solutions under the guidance of a doctor.