1. women of childbearing age or are aged between 18-50 years old who is not ready to have a child.
2. Don"t need contraception more than 5 years (because if birth control for a long time. Should choose to use other contraceptive methods instead. To avoid the side effects of long-term hormone).
3. those who do not like eating the contraceptive pill regularly.
4. those who do not have the disease or the prohibition on using hormones or medications of this type.