Diaphragm: Basic Info
The diaphragm is a small, flexible cup made of silicone that you insert into your vagina, along with spermicide, before penis-in-vagina sex. The diaphragm covers your cervix, preventing sperm from entering your uterus and fertilizing an egg. The spermicide you use with it makes sperm less able to move.
The diaphragm is reusable for up to two years, no matter how many times you use it during those two years. There are two kinds of diaphragms, a one-size-fits-most version, called Caya, and a type with multiple sizes available that has to be fitted by a provider, called Milex. The Milex diaphragm is shaped like a little bowl, and the newer Caya diaphragm is shallower and slightly curved. Caya also has a smaller, inverted dome attached to make it easier to insert and take out.
One super important thing to know is that for a diaphragm to work correctly to prevent pregnancy, you need to use it with spermicide, which kills any sperm that make it past the rim of the diaphragm. You can use either over-the-counter spermicide or prescription-only spermicide (Phexxi).
Quick Facts
Pretty effective when used perfectly, can be put in hours before sex, and doesn’t affect your hormones.
- Effectiveness
The diaphragm (used with spermicide) is pretty effective the way most people use it.
Perfect Use: 84% effective.
Typical Use: 83% effective.
- Hormones
The diaphragm is hormone-free.
- Side effects
Irritation or urinary tract infections are possible.
- Cost
Anywhere from $0 (with insurance) to $250, but you can keep using it for up to two years. Extra cost for spermicide of about $1 per dose.
- STI protection
The diaphragm doesn’t protect against STIs.
- Ongoing effort
You have to put it in place every time you’re going to have penis-in-vagina sex and leave it in for six hours after. You can leave it in for up to 24 hours, but you have to apply a new dose of spermicide before having sex each time.
