If there is an increase in leucorrhea in pregnancy, we should first observe whether there is any abnormality in the leucorrhea. If the increase is accompanied by odor itching, it is considered pathological factors and should be examined and diagnosed and treated actively. I. Physiological factors: After pregnancy, there will be obvious changes in various hormones in the body, such as estrogen and progesterone can increase significantly, which will cause a significant increase in leucorrhea. Before delivery, the contractions will discharge some cervical mucus, and the leucorrhoea will also show an increase in leucorrhoea, suggesting that delivery is imminent, these are normal physiological phenomena. Second, pathological factors: 1, gynecological inflammation: during pregnancy resistance is low, vulnerable to various bacterial or viral infections. If the leucorrhea increases and at the same time found to have an odor with itching, it often suggests that pregnant women have vaginitis. The leukorrhea may also change in character, appearing yellowish, greenish or bean curd-like. It is usually necessary to identify the type of vaginitis and then apply medication for targeted treatment. In addition, cervicitis, pelvic inflammatory disease and tubal inflammatory disease can also lead to increased leucorrhea, which should be combined with vaginal secretions, ultrasound and other examinations to confirm the diagnosis and active treatment. 2. The role of drugs: If pregnant women take oral antibiotics or sex hormones for a long time for some special reasons, it can easily lead to fungal infection, which will also manifest as increased leucorrhea. Therefore, it is recommended that pregnant women should use drugs cautiously under the guidance of a doctor to avoid excessive medication causing dysbiosis; 3. Reproductive system lesions: If suffering from cervical cancer, fallopian tube cancer and other malignant tumor diseases, it will also lead to increased leucorrhea with abdominal pain, irregular vaginal bleeding and other symptoms. It is recommended that pregnant women wear cotton underwear with good breathability, wash and replace them frequently, and disinfect them by drying. Wash the vulva with warm water frequently to ensure it is clean and dry.