A biochemical pregnancy will have symptoms such as menopause, abdominal pain, vaginal bleeding and outflow of lining tissue. 1. Menopause, pregnancy biochemistry belongs to biochemical pregnancy, there will be regular menstrual delay phenomenon, and the test paper test is positive. 2. Abdominal pain, pregnancy biochemistry due to the failure of fertilization of the egg, the endothelial tissue from the uterine cavity to stimulate the uterine contraction, which will appear abdominal pain discomfort symptoms, the general feeling of pain is not obvious, similar to the feeling of menstrual cramps. 3. Vaginal bleeding, due to the body’s hormone level increase is not obvious, resulting in the endometrium can not be normal proliferation, there will be shedding bleeding phenomenon, manifested as vaginal bleeding, similar to menstrual blood. 4. endometrial tissue outflow, pregnancy biochemistry after the meconium tissue will be discharged out of the body, appearing vaginal gray-white membrane discharge phenomenon. Some women have no symptoms of pregnancy biochemistry and it is treated as a menstrual period. Biochemical pregnancy needs to be diagnosed by ultrasound and blood test HCG test, general pregnancy biochemical will not affect the next pregnancy, pay attention to do the next preconception examination can be.