Salient. Victoria University Student Newspaper. Volume 36, Number 7. 11th April 1973
The douche is a large rubber bulb which can be filled with water or solution which is squirted up the vagina through a rubber spout. The water is supposed to wash away some of the semen, thus preventing pregnancy. The effectiveness of the douche is very low. Of 100 women who rely on the douche alone for one year, 31 are likely to become pregnant.