Chromosomal abnormalities mostly lead to embryonic failure to develop and result in early miscarriage. Chromosomal abnormalities include quantitative and structural abnormalities. quantitative abnormalities can be divided into aneuploidy and polyploidy. the most common abnormal karyotype is triploidy, and trisomy 16 accounts for 1/3, which is often lethal. 25-67% of trisomy 21, 4-50% of trisomy 13, and 6-33% of trisomy 18 are bound to miscarriage. Others are haploid (4SX) and tetraploid due to abnormal oogenesis resulting in embryonic failure. Structural abnormalities include deletion, equilibrium translocation, inversion, overlap, etc. Some experts examined 776 patients with birth abnormalities, stillbirths, and habitual abortions by using the technique of G ribbon karyotyping in peripheral blood cultures, and the results suggested 25 cases of abnormal karyotypes, with an abnormal karyotype rate of 3.2%, including 13 cases of balanced translocation carriers. Another expert reported a karyotype abnormality rate of 5.2%, of which 32 cases were autosomal abnormalities, accounting for 14.6% (32/219). This indicates that balanced translocations are the most common chromosomal abnormalities. Immunological antibodies were done for reproductive immunology, including the examination of anti-sperm antibodies, anti-endometrial antibodies, anti-cardiolipin antibodies, etc. Further humoral immunological examinations, including cD50, IgG, IgA, IgM, etc., could be done when available. The presence of these antibodies in women leads to the occurrence of infertility, miscarriage, and fetal abortion (it should be noted that intercourse during menstruation is also a factor contributing to the production of antibodies). The embryo or fetus in the womb of pregnancy is in fact a homozygous transfer, since the fetus is a combination of the genetic material of the parents and the mother cannot be identical. Immunological maladjustment between mother and fetus causes maternal rejection of the fetus. Lack of TxL antigen (also known as common antigen of chorionic villi and lymphocytes) or mother-fetus blood type incompatibility can cause miscarriage and fetal abortion. The lack of early pregnancy factor can not inhibit the recognition of embryonic antigens by sensitized lymphocytes, and autoimmune antibodies and anti-maternal and fetal antigens can destroy fetal and placental tissues and cause miscarriage and fetal abortion. In addition, anti-sperm antibodies and anti-thyroid antibodies acting on trophoblast cells can also lead to miscarriage and abortion. If you have had three or more cases of early embryonic arrest, you should go to the hospital for immunological examination. And three times or less, you should not ignore whether your kidney function is strong or not, and blindly check for antibodies. Strong kidneys will fill up the sperm, and when the sperm is full, the egg quality is good, which can ensure the quality of the fertilized egg. In addition, strong kidneys will ensure the uterus to conceive a fetus normally. This is why it is important to take the necessary herbal remedies to tonify the kidneys.