Acacia as a suppository, and it turns out fermented acacia really does have a spermicidal effect.
The substance contained spermicidal properties similar to those used on condoms.
One reason is that less than 1 percent of US women use spermicides .
And the risk is thought to be lower for women who use spermicides less frequently.
One reason is that less than 1 percent of US women use spermicides , and experts say most of them are unlikely to have an HIV-infected partner.
Sperm, shown in blue, collect against an electrospun mesh of nanofibers that can release spermicides and form a physical barrier to protect against unplanned pregnancy.