Moderate vaginitis in pregnant women can result in amniotic fluid contamination, premature rupture of membranes, preterm delivery of the fetus, and urinary tract infections in pregnant women. 1. Amniotic fluid pollution: moderate vaginitis during pregnancy lasts for a long time, can cause upward infection, easy to form turbid amniotic fluid pollution, this situation may cause fetal hypoxia. 2. premature rupture of membranes: vaginitis without treatment will lead to intrauterine infection resulting in chorioamnionitis, then it is more likely to have premature rupture of membranes. 3. Preterm birth: vaginitis is more serious during pregnancy, then the bacteria upstream infection penetrates the fetal membrane, infection to the fetus may indirectly cause preterm birth of the fetus. 4. Pregnant women with urinary tract infections: vaginitis infections during pregnancy will increase secretions, long-term secretions stimulate the urethra, it is easy to form urinary tract infections. Pregnant women with moderate vaginitis must be checked and treated as soon as possible, such as checking the routine leukorrhea to determine the cause of the disease, can be treated under the guidance of the doctor, to avoid delays in the condition.