The “white belt” is not new to most women. For women undergoing assisted reproduction at the center, the white belt is a routine test, and we are all even more familiar with it. Today, let’s learn more about the leukorrhea: 1. What is leukorrhea? Leukorrhea, in a broad sense, is all vaginal secretions. It is customary to refer to the exudate continuously secreted by the vaginal mucosa, cervical canal, endometrium and fallopian tube glands under the action of estrogen as leucorrhea. 2.What is normal leucorrhea? Normal leucorrhea is egg-white or white, sticky, without fishy smell and small amount, which is called physiological leucorrhea. The formation of normal leucorrhea mainly depends on the role of estrogen. 3.What is abnormal leucorrhea? Inflammatory diseases of the reproductive tract such as vaginitis and acute cervicitis or cancer, the amount of leucorrhea is significantly increased and the nature of the leucorrhea is also changed, known as pathological leucorrhea. It is a normal increase in leukorrhea due to ovulation, which is a sign of good endocrine secretion and does not require treatment]; ② Grayish yellow or yellowish white foamy thin leukorrhea: a characteristic of trichomonas vaginalis, which can be accompanied by vulvar itching; ③ Curdled milk thin leukorrhea: a characteristic of trichomonas vaginalis. Itching; ③ curd lumpy or bean curd-like leucorrhea: characteristic of pseudofilamentous vaginitis, often accompanied by severe vulvar itching or burning pain; ④ grayish white homogeneous fishy smelling leucorrhea: common in bacterial vaginosis, accompanied by mild vulvar itching. ⑤ Purulent leucorrhoea: yellow or yellow-green in color, sticky, and mostly smelly, due to bacterial infection. ⑥Blood-like leucorrhea: blood is mixed in the leucorrhea, and the amount of blood varies; ⑦Water-like leucorrhea: persistent flow of rice water-like leucorrhea with strange odor needs timely consultation. 4. Clinical leucorrhea routine laboratory indicators ①Vaginal cleanliness judgment criteria: ②Candida spores and mycelia (+): suggesting vulvovaginal pseudomonal yeast infection; ③Trichomonas (+): suggesting trichomonas vaginitis; ④Clue cells and bacterial vaginosis (+): suggesting bacterial vaginosis. Depending on the specific test results, the need for treatment will be determined. The “white belt” is a basic indicator of women’s reproductive health, so please pay more attention to it and seek medical attention if there is any abnormality.