To be effective, the spermicide must be placed deep in the vagina, close to the cervix. Creams, gels, and foams are squirted into the vagina using an applicator. Other types of spermicides include vaginal contraceptive film (VCF), a thin sheet placed in the back of vagina by hand, and vaginal suppositories.
Causes of Alzheimer's disease. Alzheimer's disease is caused by parts of the brain wasting away (atrophy), which damages the structure of the brain and how it works.
More than 90 percent of Alzheimerâs cases occur in people age 60 and older. The development and progression of this late-onset form of the disease are very similar to what is seen in the early-onset form of the disorder. The causes of late-onset Alzheimerâs are not yet known, but they are believed to include a combination of genetic, environmental, and lifestyle factors.