However, the time of early pregnancy reaction, the symptoms of early pregnancy reaction and the severity of early pregnancy reaction are different for each person, some people may have symptoms of early pregnancy reaction when they stop menstruation, that is, one month of pregnancy; some people do not have any reaction after pregnancy, that is, they do not have symptoms of early pregnancy reaction, but the gestational sac and the fetal heart and germ development are normal during the ultrasound. However, the development of the gestational sac and the fetal heart and germ are normal during the ultrasound, which is also a normal phenomenon, indicating that the pregnant woman is still in good health. If the pregnancy reaction is serious, some people may experience nausea and vomiting, and cannot eat or vomit when they eat, they should go to the hospital for treatment in time, because this situation may cause dehydration and water-electrolyte disorders in pregnant women, which may affect their health.