The yellow sticky discharge in mid-pregnancy is a normal physiological phenomenon if there is no odor or itching discomfort. However, if there is odor and itching discomfort, it is a pathological phenomenon and needs to be examined and treated. 1. Physiological phenomenon. After pregnancy, estrogen and progesterone increase in the body, under the influence of hormone levels will lead to increased cervical glands and vaginal secretions, such as increased secretions in the vagina is not discharged in a timely manner, after oxidation may become a yellow thick secretion, but generally do not have a bad smell and itching discomfort, do not need special treatment. 2. Pathological phenomenon. Mid-pregnancy yellow viscous discharge, accompanied by odor and itching discomfort may be pathological, and vaginitis or cervicitis and other diseases. Mostly due to the vaginal pH changes during pregnancy, vaginal flora abnormalities caused by pathogenic bacteria invasion caused by inflammation and infection, which will cause an increase in viscous discharge, yellow and itching, odor and other discomforts. If you have yellow sticky discharge in mid-pregnancy, you should pay attention to changing your underwear, and if you have any uncomfortable symptoms, you should carry out a secretion test and gynecological examination in time to treat the symptoms.