Severe gynecological problems in the third month of pregnancy have an effect on the fetus, increasing the risk of premature rupture of membranes, uterine infections and spontaneous abortion. In the 3rd trimester of pregnancy combined with severe gynecological diseases, there is a definite impact on the fetus. As pathogens may invade upwards to the fetal membranes at the endocervix, it increases the risk of premature rupture of membranes, spontaneous abortion and intrauterine infections causing adverse pregnancy outcomes. When a diagnosis is made, active treatment under medical supervision is needed to minimize the risk of pregnancy. During pregnancy, it is necessary to pay attention to timely delivery checkups, appropriate rest, strengthen hygiene education and guidance, keep the vulva clean and dry, change underwear frequently, and actively prevent and treat reproductive tract infections. You should also increase dietary nutrition, supplement sufficient vitamins, calcium, copper and zinc and other nutrients, and avoid strenuous exercise and overexertion. If the gynecological disease is serious in the third month of pregnancy, you need to go to the hospital in time, in order to clarify the cause of the disease and actively treat it.