The cost of biochemical tests, which are liver function, kidney function, blood glucose test or electrolyte test, is usually around 200-300 RMB. If a woman is pregnant and has a biochemical pregnancy, a gynecological ultrasound and blood tests for HCG and progesterone levels will be performed. If the cause of biochemical pregnancy is also investigated, chromosomal, genetic and immunological tests will be done, and the cost may be higher, about 2,000-3,000 yuan. There are many causes of biochemical pregnancy, which may also be related to the woman’s intrauterine environment and the influence of bacteria, viruses, drugs, smoking and alcohol during early pregnancy, or to the woman’s physical condition and mental stress, so there are many causes of biochemical pregnancy, which need to be ruled out item by item.