A diaphragm is a small, dome-shaped cup you insert into your vagina. It’s a physical barrier that prevents sperm from reaching the egg. Diaphragms are meant to be used with spermicide for added ...

Although the diaphragm used with a spermicide was the most effective device available, it was never as popular as the condom. Women needed to see a doctor to get one, and that was expensive and ...

A diaphragm must be inserted before sex, every time you have sex, and kept in place about six hours afterwards. It also should be used with spermicide to be more effective, Minkin says.