The blood HCG value varies greatly in different periods of pregnancy and among pregnant women. If the HCG grows slowly in early pregnancy, the common causes are ectopic pregnancy, biochemical pregnancy and poorly developed gestational sac. Common causes 1. Ectopic pregnancy: In this case, the gestational sac is laid outside the uterine cavity, resulting in poor development of the gestational sac, leading to slow growth of HCG, while the patient is mostly accompanied by mild or severe pain in the lower abdomen and a little vaginal bleeding; 2. Biochemical pregnancy: Biochemical pregnancy refers to the union of sperm and egg cells to form a fertilized egg, but the pregnancy is terminated after a short period of time after the implantation, and the pregnant woman experiences vaginal bleeding, resembling the amount of menstruation, and many Pregnant women just feel that their menstruation is delayed this time and there is no other discomfort; 3. Poor development of the gestational sac: various reasons, such as radioactive substances, drugs, viruses, etc. lead to poor quality and poor development of the embryo itself, which can also result in slow growth of HCG. Precautions In the early stage of pregnancy, diet should pay attention to reasonable supplementation of folic acid and all kinds of vitamins, and must pay attention to avoid sexual life to avoid stimulation of the uterus to cause pre-eclampsia or cause retrograde infection. Pregnant women should not have excessive mental burden and keep their mood relaxed.