If HCG doubles slowly, clinically it means the following problems: 1. Exclude the possibility of ectopic pregnancy, if it is ectopic pregnancy, then HCG does not double, but only rises a little bit every other day, clinically we should pay attention to it and understand the specific location of the gestational sac through ultrasound examination, if no gestational sac is found and HCG doubles slowly, we must be hospitalized for observation. 2. Slow doubling of HCG has It is recommended to check the HCG, progesterone and ultrasound, and to understand the situation of the last menstrual period to analyze whether to continue the pregnancy or to terminate it.