We ask this for the opposite reason you might expect. A diagnosis of endometriosis or adenomyosis doesn't rule pelvic venous disorder out — the conditions coexist frequently, they're mistaken for each other in both directions, and a confirmed diagnosis of one is a well-documented way for the other to stay invisible for years.
Two specific scenarios make your answer valuable. First: pain that continued after endometriosis treatment — excision, hormonal suppression, even hysterectomy — is exactly the situation where a venous contribution should be considered, because none of those treatments touch veins. Second: a "clean" laparoscopy that ruled endo out doesn't rule veins out — under anaesthetic, head-down, with the abdomen inflated, pelvic varices empty and collapse, so the gold-standard endo test is nearly blind to congestion.
If you answered yes: your endo history shapes how your other answers are read — cycle-locked pain leans endo, positional daily heaviness leans venous, and both at once is common. The full untangling guide walks through it.