Embryo biochemistry, or biochemical pregnancy, refers to the phenomenon of spontaneous abortion when the fertilized egg does not successfully implant. Under normal circumstances, pregnancy requires a sperm to unite with an egg cell to form a fertilized egg, which then beds down to form an embryo. Biochemical pregnancy indicates that a fertilized egg has been formed, but due to various reasons such as endometrial abnormalities, poor quality of the fertilized egg, etc., it is not capable of further development and biochemical pregnancy occurs. Biochemical pregnancies usually do not affect the next pregnancy and do not require special treatment once in a while. However, if biochemical pregnancy occurs frequently, it is necessary to consider whether there are endocrine abnormalities, immune abnormalities, genetic abnormalities and other problems. It is recommended to go to the hospital in time, complete the relevant examinations and then treat the problem.