If the pregnancy half a month for menstruation more than half a month did not come, that is, the pregnancy has been 45 days, then most pregnant women early pregnancy reaction is more obvious, mainly manifested as nausea, vomiting, loss of appetite, like spicy and sour food, hate greasy food, etc., but also varies from person to person, part of the pregnant woman will have no reaction or reaction is low. If the pregnancy half a month refers to half a month after fertilization, most pregnant women do not have early pregnancy reaction, some pregnant women may have mild nausea, vomiting, early pregnancy reaction will generally be gradually obvious with the prolongation of pregnancy, and then gradually improve and disappear. Nausea and vomiting in early pregnancy is a physiological phenomenon, if it is more serious, affecting the normal life of pregnant women, you can go to the hospital under the guidance of the doctor for treatment.