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.

Accuracy.

Explanation:

In case of polyclonal antibodies, there is a chances that the result may vary. This is because the affinity of inappropriate antigen can be same as like of appropriate antigen towards antibody.

The polyclonal antibody might bind with inappropriate antigen in case assays performed in laboratory.

There will be no accuracy of results in this case.