This study is examining a birth control patch for 13 cycles (1 year).

Inclusion Criteria:

• Requiring contraception
• Normal cervical smear
• Maximum age for smokers is 35
• History of regular cyclic menstrual periods

Exclusion Criteria:

• Pregnancy or lactation
• Significant skin reaction to transdermal preparations or sensitivity to surgical / medical tape
• Any disease that may worsen under hormonal treatment (cardiovascular, liver, metabolic)
• Use of other contraceptive methods than study medication