HCG, human chorionic gonadotropin, is a glycoprotein secreted by the trophoblast cells of the placenta. In the first 3 months of pregnancy, HCG doubles approximately every 2.5 days, and at 38 days of pregnancy, HCG is about 1000-50,000 mlU/ml. However, in clinical practice, the value of HCG may vary somewhat from woman to woman at 38 days of pregnancy due to the early and late implantation of the fertilized egg and the timing of the last menstrual period. At this time, it is recommended that pregnant women pay attention to monitoring the HCG value, preferably by means of ultrasound or color ultrasound, to monitor the growth and development status of the embryo and to perform regular maternity checkups. If the HCG value increases slowly or even decreases gradually and slowly in the early stage of pregnancy, it is recommended to seek medical examination in time, which may be considered as embryonic dysplasia, preterm miscarriage or even fetal abortion. There are also some pregnant women in early pregnancy, such as 38 days of pregnancy, will have a rapid rise or higher HCG value. When the HCG value is greater than 100000mIU/ml or more, it is recommended to check promptly to rule out the presence of abnormalities such as staphyloma and chorioepithelial carcinoma. In case of abnormalities, it is recommended to go to the hospital for further examination and treatment in time to avoid the adverse effects of abnormal pregnancy for the pregnant woman as well as the embryo. In addition, there may be abnormal HCG values due to incorrect estimation of the time of pregnancy. In this case, the pregnant woman does not need to worry and only needs to re-measure the number of weeks of pregnancy. It is important to monitor the HCG value on the 38th day of pregnancy, and it is also advisable to monitor the growth and development of the embryo dynamically by means of ultrasound and color ultrasound to try to avoid any negative effects. It is recommended that pregnant women should ensure a balanced intake of nutrition in the early stages of pregnancy, eat more fresh fruits and vegetables, ensure the intake of high quality protein, and avoid spicy and stimulating foods, tobacco and alcohol to avoid the adverse effects on the fetus. Pay attention to the protection of the body, do a good job to prevent cold and keep warm, especially to avoid the small abdomen from getting cold and prevent colds.