Final answer:
The diagnosis of dysfunctional uterine bleeding involves ruling out organic causes, which might include conducting procedures like transvaginal ultrasound and endometrial biopsy. Endometriosis, which can occasionally have similar symptoms, is diagnosed specifically via laparoscopy, not to be confused with DUB diagnosis.
Step-by-step explanation:
Diagnosis of dysfunctional uterine bleeding (DUB) predominantly involves an exclusion of organic causes. Considering potential conditions like endometriosis, which is diagnosed through a laparoscopy, may also be pertinent. For DUB, procedures such as a transvaginal ultrasound, endometrial biopsy, and Pap smear could be employed for diagnosis, but these are aimed at ruling out other conditions. Unlike DUB, endometriosis is specifically diagnosed by visual inspection during laparoscopy, showing endometrial-like tissue outside the uterus.