Oral contraceptives for men, soft IUD'S, leaving research and entering developmental stages at Population Research Center.
D000349:Africa; D000569:Americas; D001208:Asia; D002489:Central America; D003710:Demography; D019049:Developed Countries; D003906:Developing Countries; D005060:Europe; D005061:Europe, Eastern; D006262:Health; D009656:North America; D009747:Nutritional Physiological Phenomena; D010139:Pacific Islands; D011153:Population; D011157:Population Dynamics; D011158:Population Growth; D013020:South America; D014586:USSR; D014481:United States
Africa; Americas; Asia; Central America; Demographic Factors; Developed Countries; Developing Countries; Eastern Europe; Europe; Health; North America; Northern America; Nutrition; Oceania; Population; Population Dynamics; Population Growth; South America; United States; Ussr; Western Europe