A married couple is discussing alternatives for pregnancy prevention and has asked about fertility awareness methods (FAMs), also known as natural family planning methods. What is the nurse's most appropriate reply?

They are not very effective, and it is very likely you will get pregnant.

They can be effective for many couples, but they require motivation, bodily awareness, and recordkeeping.

These methods work better for women with irregular cycles.

You would be much safer taking the pill. Then you will not have to worry.