Normally, you will have an early pregnancy reaction of nausea and vomiting on the 35-40th day of pregnancy. The number of days of pregnancy is calculated from the first day of the last menstrual period. The symptoms of early pregnancy reaction will be different for each person. Some pregnant women may experience breast pain, lower abdominal distension or back pain, some pregnant women may experience nausea and vomiting, stomach distension, aversion to greasy food, etc. Some pregnant women may experience dizziness, drowsiness and weakness. For women who usually have regular periods, once the period is delayed for more than a week, the possibility of pregnancy will be higher. In order to confirm whether you are pregnant or not, the easiest way can be to use the morning pregnancy test paper test, which is more accurate when performed with morning urine. If the test is two bars, you can go to the hospital to check the blood hcg and progesterone, and you can also check the ultrasound to confirm whether it is an intrauterine pregnancy or ectopic pregnancy. The phenomenon of early pregnancy reaction usually does not require special treatment. In the early stage of pregnancy, you need to eat a light diet with small and frequent meals, and pay attention to rest and not to exercise strenuously or have intercourse. Oral folic acid should be taken in the first trimester to prevent fetal neural tube defects.