At 19 weeks of pregnancy, leukorrhea is usually normal. After a woman is pregnant, due to changes in hormone levels in the body, the leukorrhea is affected by estrogen and progesterone and will change to some extent, which can be seen in the case of leukorrhea at 19 weeks of pregnancy. If there are no other abnormal symptoms, it is normal. However, if the leukorrhea is accompanied by changes in the color and smell of the leukorrhea, such as yellowish, greenish or bloody leukorrhea, and a fishy, ichthyotic or malodorous smell, it is considered to be caused by diseases, commonly trichomoniasis, bacterial vaginitis and cervicitis and other gynecological diseases. Pregnant women during pregnancy should pay attention to do a good job of prenatal checkups, actively listen to the advice of professional doctors to do a good job of comprehensive care and health care, pay attention to personal hygiene, keep the local skin clean, and use more water to wash. During pregnancy, pay attention to rest, at the same time should relax, avoid tension, anxiety, any discomfort should be timely to the hospital, by the doctor to clarify the diagnosis, and cooperate with the doctor to deal with the symptoms.