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.
The Search for Alzheimerâs Causes and Risk Factors. 1  While scientists know Alzheimer's disease involves progressive brain cell failure, the reason cells fail isn't clear. Like other chronic conditions, experts believe that Alzheimer's develops as a complex result of multiple factors rather than any one overriding cause. The greatest risk factors for Alzheimerâs are older age, having a family history of Alzheimerâs and carrying the APOE-e4 gene.