A diaphragm is a silicone, cup-like object that you insert into your vagina to cover your cervix. Diaphragms must be used in conjunction with spermicide, which is a sperm-killing gel. A diaphragm ...

Both Gersh and McDonald-Mosley agree that spermicide on its own is not reliable enough. "If you're not looking to get pregnant anytime soon, it's important to double up with a condom or diaphragm ...