Enormous difficulties.
Peng
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D000367:Age Factors; D000383:Agriculture; D001208:Asia; D001723:Birth Rate; D002681:China; D003247:Conservation of Natural Resources; D003267:Contraception; D003268:Contraception Behavior; D003710:Demography; D003906:Developing Countries; D004467:Economics; D004777:Environment; D005193:Family Planning Services; D005202:Asia, Eastern; D005298:Fertility; D006285:Health Planning; D007878:Legislation as Topic; D008393:Marriage; D009934:Organization and Administration; D011153:Population; D011154:Population Characteristics; D011155:Population Control; D011156:Population Density; D011157:Population Dynamics; D011158:Population Growth; D011640:Public Policy; D011788:Quality of Life; D012106:Research; D012946:Social Welfare
Age Factors--women; Agriculture; Asia; Baby Boom; Birth Rate; Carrying Capacity; China; Contraception; Contraceptive Prevalence; Contraceptive Usage; Demographic Analysis; Demographic Factors; Developing Countries; Eastern Asia; Economic Factors; Environment; Family Planning; Family Planning Programs; Fertility; Fertility Measurements; Fertility Rate; Legislation; Macroeconomic Factors; Marriage; Marriage Age; Marriage Patterns; Natural Resources; Nuptiality; Obstacles; Organization And Administration; Policy; Population; Population Characteristics; Population Control; Population Dynamics; Population Growth; Population Law; Population Policy; Population Pressure; Population Size; Quality Of Life; Research Methodology; Research Report; Social Policy; Social Welfare