Fertility Awareness
Fertility awareness is also referred to as natural family planning. This method involves timing sexual activity to avoid a woman's most fertile periods. Measuring basal body temperature and monitoring cervical mucus are ways to determine when a woman is fertile. Your health care professional can train you in the safest way to use this method correctly.
Pros: It's inexpensive and does not involve drugs or medical procedures.
Cons: Spontaneity is limited, and it is only effective about 75% of the time (meaning you have a 1 in 4 chance of getting pregnant).