There is a certain pleasure in recognising something that has been well made. Good design is about using materials that are fit fo...
What it is:
The diaphragm is a soft rubber dome with a flexible rim that covers the cervix. The cervical cap is a thimble-shaped device that fits snugly on the surface of the cervix.
What they do:
Both reusable birth-control devices block sperm from entering the uterus, but should be used along with a spermicide (nonprescription, nonhormonal chemical foams, creams, gels, suppositories, and films containing the active ingredient nonoxynol-9 or octoxynol-9). The diaphragm can be inserted up to six hours before intercourse and should remain in place for six to eight hours after intercourse, but it should never be kept in place any longer than 24 hours. The cervical cap can be left in place for up to 48 hours.