What it is:
The birth control patch (Ortho Evra) is a one-and-three-quarter inch skin sticker that consists of three layers, with hormones embedded in the adhesive layer.

What it does:
When applied to the skin (lower abdomen, butt, or upper body, but not breasts) it slowly releases hormones for a week. The hormones prevent ovulation and thicken the cervical mucus, which blocks sperm from entering the uterus. It must be replaced every week. After three weeks (and three new patches) you have one week that is patch-free, during which you get your period.

Pros:
The patch is 99 percent effective in preventing pregnancy when used correctly. It's more convenient than remembering to take a daily pill or inserting a device before intercourse. And since it contains the same hormones, the patch may help with preventing acne, cramps, and pelvic inflammatory disease like the Pill does.

Cons:
Some doctors may not prescribe the patch for women who weigh more than 198 pounds. Also, some side effects may include bleeding between periods, breast tenderness, and nausea. Some women may experience a reaction or irritation where the patch is located on her skin.

In 2005, the FDA updated the labels on Ortho Evra, stating that the birth-control patch delivers a higher dose of estrogen than the birth control pill and therefore may increase the risk of blood clots. Women taking or considering the birth control patch should talk to their healthcare professional about these risks. Use of the patch also carries the other cardiovascular risks of the Pill (heart attack and stroke).

Protects against STDs?
No

Prescription needed?
Yes