Materials, products and services - the Green Guide Online provides details of the life cycle environmental impacts of construction materials and components, and the Green Book is a free online database of products and services.
Spermicides are used globally for birth control, with or without condoms. As the only means of birth control, spermicides are rarely effective. However, in conjunction with condoms, spermicides are somewhat effective in birth control.
You should always use it with spermicide. When you do, the diaphragm is 82%-94% effective. That means that out of 100 women who use it, 6-18 will get pregnant in a typical year. The woman puts spermicide in and around the rim of the diaphragm, and then inserts it into her vagina no more than 2 hours before sex. You need to keep it in place for at least 6 hours after sex. If you make love again during that time, you should use more spermicide each time. Remove the diaphragm within 24 hours.