Abnormal uterine bleeding due to ovulatory dysfunction AUB-O is abnormal uterine bleeding that, after examination and ultrasonography, cannot be attributed to the usual causes structural gynecologic abnormalities, cancer, inflammation, systemic disorders, pregnancy, complications of pregnancy, use of oral contraceptives or certain drugs. See also Vaginal Bleeding. During an anovulatory cycle, the corpus luteum does not form. Thus, the normal cyclical secretion of progesterone does not occur, and estrogen stimulates the endometrium unopposed.
Top of the page Check Your Symptoms. Many women experience abnormal vaginal bleeding or spotting between periods sometime in their lives. Vaginal bleeding is considered to be abnormal if it occurs:. Abnormal vaginal bleeding has many possible causes. By itself, it does not necessarily indicate a serious condition.
Dysfunctional uterine bleeding DUB is a condition that affects nearly every woman at some point in her life. Also called abnormal uterine bleeding AUB , DUB is a condition that causes vaginal bleeding to occur outside of the regular menstrual Read More.