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Discovery of disposable vaginal speculum is between 1845 and 1849, conducted gynecological experiments on the bodies of enslaved black women. And developed new surgical techniques to repair obstetric fistulas, which occur during childbirth when the baby’s head is pressed against the vaginal walls for a long time, interrupting the blood supply and creating openings through which urine or feces can enter the vagina. Although basic anesthetics were available at the time, Sims did not use them to cut and stitch his patients.