What is "unmet need” in family planning?

Unmet need for family planning is defined as the percentage of women of reproductive age, either married or in a union, who want to stop or delay childbearing but are not using any method of contraception.
Unmet need for family planning= (Women of reproductive age (15-49) who are married or in a union and who have an unmet need for family planning)/(Total number of women of reproductive age (15-49) who are married or in a union) X 100

List the common reasons for unmet need in India as per NFHS-3 data.
Unsatisfactory services for contraception provision
Lack of information
Fear about side effects of contraceptives
Opposition form husband or relatives

List some determinants for higher unmet need as per NFHS-3 data.
Rural areas
Low level of education among women
Religion
Socio – economic status

Reference:

1. Park K. Demography and family planning. In: Park K. Park's Textbook of Preventive and Social Medicine, 24th ed. Jabalpur, India: Banarsidas Bhanot Publishers, 2017; pp. 525-52.
2. Bhalwar R. Contraceptive technology. In: Bhal- war R, Vaidya R, Tilak R, Gupta R, Kunte R, editors. Text Book of Public Health and Community Medicine. Pune, India: Dept of Community Med. AFMC in collaboration with WHO, New Delhi; 2009.
3. World Contraceptive Use 2014. Unmet need for family planning. United Nations Population Division. Available at: http://www.un.org/en/development/desa/population/publications/dataset/co... Accessed November 17, 2017.
4. Contraceptives. In: Mastering Practicals – Community Medicine. Eds. Tiwari P, Tiwari S. Lippincott William & Wilkins; Wolters Kluwer. New Delhi Buy at: https://www.amazon.in/Mastering-Practicals-Community-Medicine-thePoint/d...