Transdermal Contraceptive Patch ("the patch")
The patch (brand name Ortho EvraŽ) is a highly effective, weekly hormonal birth control patch that is worn on the skin to prevent pregnancy. It is worn for one week and replaced on the same day of the week for three consecutive weeks, with the fourth week "patch-free." The patch is a very thin, beige, smooth square that measures 1-3/4 inch on each of its four sides. It uses a combination of the hormones estrogen and progestin to prevent pregnancy-like most birth control pills. It can be worn on the arms, buttocks, or abdomen. About 4 in 100 patches will partially or completely come off.