After sex is not recommended for gynecological examination, the reasons are as follows: 1, because couples just after intercourse, women’s body hormone levels and not before intercourse will have a big change, such as sex hormones, estrogen, etc., which in the clinical examination of the diagnosis of the disease as well as the judgment of the condition, plays an important role in guiding. If the gynecological examination is carried out after intercourse, then the results of the laboratory tests are likely to be wrong, thus interfering with the correct diagnosis, therefore, the gynecological examination should not be carried out after intercourse; 2, after sex, the male party may transmit certain bacteria to the female party, thus leading to the gynecological examination of the results of the laboratory tests out of the wrong or inaccurate, such as the number of certain bacteria, the type of bacteria in the female secretion, For example, the number of certain bacteria, the type of bacteria in the female secretion, the number and proportion of white blood cells and macrophages, etc., will have a big difference with that before sex, so sex is not allowed for gynecological examination.