Final answer:
Five common methods are fertility awareness, male condom, birth control pill, and IUD, listed from least effective to most effective. A new method with a 35% failure rate would not be considered effective.
Step-by-step explanation:
Contraception, also known as birth control, is a method or device used to prevent pregnancy. Effectiveness of contraceptive methods is typically measured by the failure rate, which is the percentage of women who become pregnant while using the method over a year. Here are five methods of contraception listed from least effective to most effective based on typical use:
- Fertility Awareness Method: This behavioral method involves tracking fertility signals like menstrual cycle, temperature, and cervical mucus to avoid intercourse during fertile periods. Advantages include no medical or hormonal side effects. Disadvantages include a high failure rate and the need for daily monitoring.
- Male Condom: A barrier method that prevents sperm from entering the uterus. Advantages include protection against sexually transmitted infections (STIs) and its accessibility. Disadvantages involve potential breaks or slippage during intercourse.
- Birth Control Pill: A form of hormonal contraception that suppresses ovulation. Advantages include high effectiveness with perfect use and potential benefits for menstrual regulation. Disadvantages involve adherence to a daily regimen and no protection against STIs.
- IUD (Intrauterine Device): A device inserted into the uterus that can prevent pregnancy for several years. Advantages are its long-term effectiveness and the set-and-forget nature. Disadvantages could include discomfort during insertion and potential for expulsion.
For a new contraceptive method with a 35 percent failure rate, it would not be considered effective compared to existing methods, as over one-third of users would experience an unintended pregnancy within the first year of using this method.