Embryonic biochemical pregnancy usually has no precursors. Embryonic pregnancy refers to a miscarriage that occurs when the sperm and egg unite to form a fertilized egg but fail to implant. Biochemical embryonic pregnancy is a kind of miscarriage caused by a variety of factors, usually without precursors, and biochemical pregnancy does not have too obvious abnormal manifestations, may just appear a few days delay in menstruation, menstrual flow is a little too heavy, etc., and some patients will have a slight pain in the lower abdomen, which can be relieved on their own, so that a lot of biochemical pregnancies go undetected. The cause of biochemical pregnancy may be the poor quality of the embryo, or the woman’s factors or the man’s sperm quality is poor, etc. Since biochemical pregnancy does not implant, it does not have too much effect on the uterine lining, so it usually does not affect the normal preparation for pregnancy. However, if the recurrence of biochemical pregnancy, you should go to the hospital for examination, to clarify the cause of the symptomatic treatment. It is recommended that couples go to the hospital for preconception examination during the preparation for pregnancy and strengthen life management to reduce the occurrence of biochemical pregnancy.