Delayed menstruation with yellowish leukorrhea depends on how many days it is delayed, if it is delayed within a week, it is normal. The normal menstrual cycle is thirty days. If your period is delayed, women of childbearing age must take a pregnancy test to rule out pregnancy. A delay of up to a week is normal, but more than a week is considered a menstrual disorder. If your period is delayed for more than a week, it is a sign of endocrine disorders, so you should have a checkup and get treatment according to the results of the checkup. The yellowing of the leukorrhea suggests inflammation. First, bacterial vaginitis. There will be yellow, sticky, copious discharge; second, trichomonas infection. There will be watery leukorrhea, yellowish discharge, itching and odor. Third, cervical erosion. There will be yellow, sticky, and copious leukorrhea. Therefore, delayed menstruation first use early pregnancy test paper to detect whether pregnancy, if pregnancy leukorrhea is yellow, suggesting pregnancy combined with vaginal inflammation. If the pregnancy test paper is negative, yellowish leukorrhea, more than a week to, suggests that menstrual irregularities combined with vaginal inflammation, must be based on the results of the selection of appropriate drugs and then symptomatic treatment.