[Changes in fertility].
Welti
C
C
D000569:Americas; D001723:Birth Rate; D003267:Contraception; D003268:Contraception Behavior; D003710:Demography; D003906:Developing Countries; D005193:Family Planning Services; D005298:Fertility; D006285:Health Planning; D007843:Latin America; D008800:Mexico; D009656:North America; D011153:Population; D011157:Population Dynamics
Americas; Contraception; Contraceptive Usage; Demographic Factors; Developing Countries; Family Planning; Family Planning Programs; Fertility; Fertility Decline; Fertility Measurements; Fertility Surveys; Latin America; Mexico; North America; Population; Population Dynamics