Birth Control Patch

This patch contains combination hormone medication and is used to prevent pregnancy. It contains 2 hormones: a progestin (norelgestromin) and an estrogen (ethinyl estradiol). It works mainly by preventing the release of an egg (ovulation) during your menstrual cycle. It also makes vaginal fluid thicker to help prevent sperm from reaching an egg (fertilization) and changes the lining of the uterus (womb) to prevent attachment of a fertilized egg. If a fertilized egg does not attach to the uterus, it passes out of the body.  The patch is changed weekly for three weeks and then off a week during your period.  The patch is applied to a clean dry area in the lower abdomen and you can switch sites weekly.