Ralk's Gold Pessary
The origin of this birth control device is not entirely clear, with some sources suggesting it was introduced in the 20th century and some saying as early as 1880. Most historians sight 1930 as the last known usage of this device. The disk, with spring and stem protruding from the bottom, would be inserted into the vagina, resting on the cervix. The stem would have protruded into the uterus, stopping fertilized eggs from being implanted in the uterine wall. Since the 1930s, these wishbone pessaries have been replaced by more advanced forms of intra uterine devices, which sit farther into the uterus. The device is known for having good results in preventing pregnancy and most women found it satisfactory.