[Modern methods of contraception and the decline in natality].
Blayo
C
C
D001723:Birth Rate; D003267:Contraception; D003710:Demography; D005193:Family Planning Services; D005298:Fertility; D011153:Population; D011154:Population Characteristics; D011157:Population Dynamics
Birth Rate--changes; Contraception; Demographic Factors; Family Planning; Fertility; Fertility Measurements; Population; Population Characteristics; Population Dynamics