Write down the drawbacks of each natural method of contraception.

What are the advantages and disadvantages of natural method of contraception?

Explanation:

NFP can be quite effective in reducing the odds of pregnancy, to less than one per cent per year. However, since many couples do not use the method perfectly, the typical-use pregnancy rate is closer to 25 percent. These methods are almost cost-free except for a basal body thermometer and perhaps a menstrual calendar.