In clinical practice, it is not necessary to fast for blood testing of blood hCG, because the value of blood hCG will not be affected before or after meals, so it is recommended that you can go after eating or go to have blood drawn in a fasted state without any effect. Blood hCG is usually drawn before 9:00 a.m., and the results will be available after 3:30 p.m. It is recommended that it is best to go to the blood test before 9:00 a.m. In clinical practice, blood hCG is mainly used for the diagnosis of early pregnancy, or in case of pre-eclampsia, blood needs to be drawn for examination, and also for the diagnosis of ectopic pregnancy. Since the doubling of blood hCG in ectopic pregnancy is not particularly obvious, blood hCG needs to be monitored once every other day to initially determine whether it is an ectopic pregnancy, and in case of post-cleaning of gravida, blood hCG also needs to be monitored.