The concept of unmet need.
D001721:Birth Intervals; D003267:Contraception; D003268:Contraception Behavior; D004467:Economics; D005069:Evaluation Studies as Topic; D005193:Family Planning Services; D006301:Health Services Needs and Demand
Birth Limiting; Birth Spacing; Contraception; Contraceptive Usage; Critique; Economic Factors; Family Planning; Needs