Birth Control Patch

The facts: The birth control patch (also called "the patch") releases the hormones progestin and estrogen through the skin into the bloodstream to prevent pregnancy. An alternative to birth control pills, the thin, beige, one-and-three-quarter-inch square clings to your skin like a band-aid. The patch should be applied to the lower abdomen, buttocks or upper torso, excluding the breasts. It is worn for a week at a time and is changed on the same day of the week for three consecutive weeks. The fourth week is "patch-free," when a user should experience her period.

How well it works: 99 percent effective when used correctly -- comparable to birth control pills.

Pros:
• Extremely effective in preventing pregnancy.
• Much easier for many women to use the patch rather than the pill -- it's more convenient to change a patch once a week rather than remember to take a pill every day. (Most of the reported seven percent failure rate of oral contraceptives is due to missed pills.)
• Remains effective when a woman changes it at any time on her weekly "patch change day."
• Can be worn on different parts of the body and remains attached and effective while bathing, swimming, exercising or in humid conditions. Thin enough to be worn discreetly beneath clothing.

Cons:
• Does not provide protection from sexually transmitted diseases.
• Contains hormones similar to those found in birth control pills, causing many of the same side effects, such as breast discomfort, headache, moodiness and nausea. Additional side effects can include upper respiratory infection, menstrual cramps and abdominal pain.
• Seems to be less effective for women weighing over 198 pounds.
• Women who use the patch are strongly advised not to smoke, as doing so can increase the risk of severe cardiovascular effects.
• Not recommended for women who have blood clots, certain cancers, a history of heart attack or stroke, and those who are or may be pregnant.

Where to get it: Available by prescription.

Cost: The monthly cost of the patch, if not covered by insurance, is similar to that of birth control pills (approximately $30 to $35).