The causes of infertility are complicated. Among infertile couples, the female factor accounts for 40~50%, among which the main causes of female infertility are abnormal ovulation, fallopian tube factor and uterine infertility, which have always affected the happiness of many families and also related to a woman's life. From a medical point of view, female infertility refers to women of childbearing age who have been in the same room for more than 2 years after marriage, their spouses have normal reproductive function, are not pregnant without contraception, or are pregnant, endometriosis, uterine factors and so on. Male factors account for 25%~40%, mainly spermatogenesis and insemination.
The blood type of ABO system depends on the antigen type on the cell membrane, for example, red blood cells are antigen A, and their blood type is type A; If there is B antigen on red blood cells, the blood type is B; If there is neither a antigen nor b antigen on red blood cells, it is type o; If both A and B antigens exist, it is AB type. Blood type is a method to classify blood, which usually refers to the classification of red blood cells, based on whether there are some heritable antigen substances on the surface of red blood cells. The antigenic substance can be protein, sugar, glycoprotein or glycolipid.
If the mother is RH negative blood and the father is RH positive blood, there is also a risk of hemolysis of RH blood group in newborns. In this way, during pregnancy, it is necessary to closely monitor the titer of relevant blood group antibodies. If there is an increase in the titer of blood group antibodies, it is necessary to make corresponding treatment preparations in advance.