Offering bonuses for reduced fertility.
D000293:Adolescent; D000328:Adult; D003365:Costs and Cost Analysis; D003906:Developing Countries; D005193:Family Planning Services; D005260:Female; D005298:Fertility; D005380:Financing, Government; D006801:Humans; D008875:Middle Aged; D009042:Motivation; D011155:Population Control; D011158:Population Growth; D011247:Pregnancy; D012201:Reward