"The cervical cap is a small barrier device which can be filled with spermicidal agent and placed over the cervix. Protocol at the authors’ practice recommends that women fill the caps two-thirds full with a contraceptive agent containing 5% nonoxynol-9 spermicide. The cap can be left in place for a maximum of seven consecutive days without further attention provided the cap retains its spermicide. The cap should be removed when menstruation begins. Currently, there are no contraceptive caps manufactured in the United States. However, there are several types of cervical caps available from Europe. (The caps discussed below are available from Lamberts (Dalston) Ltd., Queens-bridge Road, London, England: approximate price, $11.00.)"