With the changing social environment, there are more and more patients presenting with spontaneous abortion and embryonic arrest, and we have some very effective experience in clinical treatment with a well-established protocol. Our inpatients have a success rate of more than 90% in terms of safe abortion. As long as you come to our hospital before conception and start to see us, basically all of them are successful. In modern society, there are many external factors, so for patients who have one spontaneous miscarriage or embryonic arrest, it is not necessary to check the chromosomes of both spouses, but only to do some basic tests, such as five items of infertility, four items of eugenics, three items of A gong, trace elements, blood sugar, CT of white belt, UU, HSG and so on. If the female partner has O blood type and the male partner has any blood type other than O, ABO hemolysis screening is required. If there is any abnormality in these basic tests, treatment can be given and pregnancy can be carried out after normalization. If the embryo is developing well, no special treatment is needed. If unfortunately the embryo stops developing again or miscarriage occurs spontaneously, it is recommended that both partners should have chromosome and antibody tests. The treatment plan is the same as the treatment for two or more spontaneous abortions or embryonic arrest. For patients with two or more spontaneous miscarriages or embryonic arrests, it is recommended that both spouses should undergo chromosomal examination first, and if either spouse has chromosomal abnormalities, genetic counseling is recommended; if both spouses have normal chromosomes, the next tests such as the five tests for infertility, four tests for eugenics, three tests for A, trace elements, closed antibody, homocysteine, D-dimer, glucose, and leukocytes are recommended. D-dimer, blood glucose, CT, UU, HSG, etc. If the female partner has O blood type and the male partner has any blood type other than O, ABO hemolysis screening is required. Immunotherapy is recommended for patients who are normal in the above tests (except for closed antibody) and who are negative for closed antibody and have not given birth to a normal fetus; immunotherapy is not recommended for those who are negative for closed antibody but have a history of normal pregnancy and delivery and for those who are positive for closed antibody. If any of the above tests (except for closed antibody) is abnormal, immunotherapy is not necessary regardless of whether the test is negative or positive, and the corresponding treatment is provided for the abnormal test. (1) Hysteroscopic hysterectomy is recommended for incomplete longitudinal hysterectomy in HSG results. (2) For those with positive antibodies to any of the five items of infertility, prednisone and aspirin should be given orally and retested after half a month, and pregnancy can be carried out after a negative result. (3) For viral infection in any of the four eugenics items, give the appropriate antiviral treatment. (4) For abnormal thyroid function, especially for subclinical thyroid function (i.e. normal FT3 and FT4 but abnormal TSH), we need to be more vigilant and recommend that pregnancy be carried out within the normal range after TSH treatment and close monitoring of thyroid function after pregnancy. (5) For those with elevated ABO antibody potency, it is recommended that pregnancy be carried out after normal treatment with Chinese herbal medicine and close monitoring of ABO antibody potency after pregnancy. (6) For those who are deficient in micronutrients, appropriate supplementation should be given, especially for zinc and selenium content, which should be within the normal range before pregnancy, and appropriate amount of zinc and selenium can be supplemented in early pregnancy. (7) For patients with abnormal blood glucose, it is recommended to consult with internal medicine to control the blood glucose within the normal range before pregnancy and closely monitor the changes of blood glucose during pregnancy. For immunotherapy in patients with recurrent spontaneous abortion, the following points should be noted: (1) Immunotherapy is contraindicated in those with positive autoantibodies and antinuclear antibodies; (2) We should strictly grasp the indications for immunotherapy: primary recurrent spontaneous abortion, no autoantibodies, and normal embryonic chromosomes; (3) Immunotherapy should be done for a maximum of 6 times, and if the closed antibodies are consistently negative, no further treatment is needed and it is recommended to try for pregnancy.